It's unfortunate most shops now want the biggest money rip and always say engine rebuild or some similar $8,000 repair. I went from zero experience to doing almost all maintenance on my car after the last repair quote at a trusted "independent" shop was $11,5000 and it was just a clogged filter. Too bad trust is gone.
Cylinder 1 misfire in a 2012 Volkswagen Passat SE, replaced the spark plug and the ignition coil. The check engine light went from a solid orange light (pre-fix) to a flashing orange light (post-fix). Only code that had came up on my OBD scanner was P0301. Not entirely quite sure what the issue is with it, as the coils/plugs were brand new straight from the box and didn't show signs of anything faulty with them. Ran through possible outcomes before putting them in to make sure nothing would go wrong with the process, so I'm really at quite a loss as to what to do here.
A flashing check engine light after replacing the spark plug and ignition coil for a cylinder 1 misfire (P0301 code) on your 2012 Volkswagen Passat SE usually indicates a more serious misfire that could damage the catalytic converter. Since you've already replaced the spark plug and ignition coil without resolving the issue, consider the following steps: Check Installation: Double-check the installation of the new spark plug and ignition coil to ensure they are properly seated and connected. Inspect Fuel Injector: The problem might be with the fuel injector of cylinder 1. A clogged or faulty injector can cause misfires. Check for proper operation or signs of clogging. Compression Test: Perform a compression test on cylinder 1. Low compression can result from issues like a blown head gasket, worn piston rings, or valve problems, leading to misfires. Examine Wiring and Connectors: Check the wiring and connectors leading to the ignition coil and fuel injector for cylinder 1. Damaged wires or loose connections can cause misfires. Vacuum Leaks: A vacuum leak in the intake manifold can lead to misfires, especially if it's near cylinder 1. Listen for hissing sounds and check for leaks using a smoke test if necessary. Check the Engine Control Module (ECM): Rarely, the issue could be with the ECM itself. Ensure the software is up to date and check for any signs of ECM malfunction.
I recently got new cat fitted, 3 weeks later it was throwing a code p0420 and p0303, now its just showing p0303 , i changed coils and plugs, plugs were really bad, which i was surprised at as it was only 2 years ago i got new 1s fitted, but 1 had almost like crazy build up that almost looked like stones, stuck round the thread and another had tiny bit of oil on it, so i replaced them with new1s, hoping that would fix it but code came back in no time, theres no sign of head gasket leaks and under the oil cap is clean, the coolant looks fine also, tbh i was shocked at how bad 1 of the plugs were, so its prob on its way out if looking like that, but surprisingly the really bad spark plug was in cylinder 1 but i have p0303 code which was weird. My revs are not jumping, my exhaust is sputtering at the rear, its a celica 2001 vvtli, im gonna try clean the injectors to see if that is the problem but im losing my mind, just want my car back with power😅
@@michaeldawson6141 I returned and swapped out the new ignition coils and spark plugs after finding out that sometimes they bust in the packaging, didn't have issues with the new pieces.
2014 z71 replaced packs plugs and wires drove it a 8 miles with little to no shimmy sounded good it sat over night and then I get a flashing check engine light
Hi Steven. Did you manage to solve the problem? Since the light started flashing after replacing the ignition coils (packs), plugs, and wires, it's possible there's an issue with the installation, a defective part, or another underlying engine problem that wasn't addressed by the replacements. It's important to read the diagnostic trouble codes (DTCs) with an OBD-II scanner to pinpoint the exact cause. Given the situation, it's advisable to avoid driving the vehicle until it's been inspected and repaired to prevent further damage.
When I was a child doctors used to ask: "when/how did it start happening?" 🙄 Doesn’t how or when the problem started to happen make a difference in the diagnostic? I have a 20 year old Volvo s40 with 120,000 miles which looks like it just came out of the dealer! It was running great until… getting on a freeway had a bad truck driver coming really fast which forced me to accelerate really hard… it got me out of trouble but when I got home the engine light started flashing and the car sounded and felt like misfiring. I have another car so I stopped driving it since I learned it could make it worse. I replaced the spark plugs and coils and the catalytic converter which was the original and really needed to be replaced; however, nothing stopped the flashing light but when I think about it in my case what are the chances that the hard acceleration could've caused the plug wires or spark plugs go bad? They were not old before anyway and I’ve always replaced everything I can with original Volvo parts! So I’m afraid I have to think the worse that could’ve happened… sadly since I bought this car originally in 2003 and used it to take my son to school.. wanted to keep it but now I doubt I’ll be able to.. any ideas pls welcome!
2014 Grandcherokee Summit, cylinder 3 / multiple misfire, replaced SPARK PLUGS, COILS and FUEL INJECTORS on all 6 cylinder, engine ride/idle quiet, ENGINE LIGHT BACK ON, any idea on my issue?
Thanks for the information. I have a problem I am hoping you can shed some light on. I had engine misfire and replaced all. the coils and spark plugs. The misfire went away. Also have a new fuel filter. Six months later, I am experiencing a random misfire. Sometimes the car runs perfectly, and all of the sudden it misfires for a few seconds. Sometimes the "Service engine light soon" flashes on and off during the misfire. Then it goes back to running ok. I have poured motor treatment liquids to see if cleaned injectors and the such. Once it misfires, I can detect a P0300 code and troubleshooting this has been difficult. I do not get more specific codes. 2003 GMC Envoy XL 4.2L 6 Cyl. Any thoughts?
Hi, my pleasure. Experiencing random misfires in your 2003 GMC Envoy XL 4.2L 6 Cyl after replacing coils, spark plugs, and fuel filter suggests several potential issues. Given that the misfire seems intermittent and triggers a P0300 code without more specific fault codes, consider the following areas for further diagnosis: Fuel System: Despite a new fuel filter, issues with fuel pressure (fuel pump problem or clogged fuel injectors) can cause random misfires. Using motor treatment liquids might not fully clean clogged injectors. Electrical Connections: Loose or corroded electrical connections to the coils or spark plugs can cause intermittent issues. Vacuum Leaks: A vacuum leak in the intake manifold gasket or vacuum hoses can lead to misfires, especially noticeable at idle or low-speed operation. Catalytic Converter: A partially blocked catalytic converter can sometimes cause random misfires due to restricted exhaust flow. Crankshaft or Camshaft Position Sensor: Faulty sensors can lead to misfires as they provide critical timing information to the engine's control unit. Given the complexity and range of possible causes, a thorough diagnostic approach is necessary. Consider having the fuel system pressure tested, inspecting all electrical connections for tightness and corrosion, checking for vacuum leaks with a smoke test, and testing or scanning for issues with the crankshaft and camshaft position sensors. A diagnostic tool capable of real-time data monitoring might help pinpoint the issue more effectively by observing engine parameters during a misfire event.
I have a 2010 Chevy Tahoe. Shakes when driving and sometimes when holding down on brake.shakes more between 20mph-40mph.if I go past 40mph it seems to calm down.
2013 Infiniti m37xs ....changed spark plugs, coils, timing belt, it idles fine but has no good power when driving, codes are p0300 and p0305...no check engine light but when put the scanner it says permanent stored codes. Please help
They were faulty spark plugs this happen more often then peope think including myself lol double check what gap your car spark plugs need to be (usually on a white label under your hood) and go to AutoZone get some with the same gap and they should be good.
I changed all spark plugs and ignition coils to my Mazda 15. engine light went off 2nd day. Came back on 3rd day. Car drives fine. Only when it’s started and brakes on it does the misfire shake. What could this be?
Clean your throttle body, check your air filter and make sure your spark plugs and ignition hardness wires are good and that should fix it. Especially cleaning the throttle body makes a big difference !
replaced all coils, and spark plugs on 2010 passat. random misfire and misfire on all 4 cyls randomly, mostly on cold startup. brake lights also dont activate until pedal is pressed .5-1 inch. engine runs rough from stand still unless i press the gas just enough but not too much or it lurches harder than it does when i dont press the gas. the local vw dealer did a shit job of diagnosing and charged me $600 to tell me they didnt know what was wrong with the brakes and said i needed new coils and spark plugs AGAIN
It sounds like you’ve got a real conundrum with your 2010 Passat. Let’s break down the potential issues and solutions: Misfires and Engine Roughness 1. Vacuum Leaks: Check for any vacuum leaks. These can cause misfires and rough idling, especially when the engine is cold. 2. Fuel System Issues: Ensure the fuel injectors are clean and working properly. A clogged or malfunctioning injector can cause misfires. 3. ECU Problems: The engine control unit (ECU) might need reprogramming or replacement. Sometimes, software issues can lead to random misfires. 4. Mass Air Flow (MAF) Sensor: A faulty MAF sensor can cause erratic engine behavior. Cleaning or replacing it might help. Brake Lights and Pedal Response 1. Brake Light Switch: The brake light switch might be faulty or incorrectly adjusted. It’s located near the brake pedal and can be adjusted to activate the lights with less pedal travel. 2. Master Cylinder: If there’s an issue with the master cylinder, it might affect both the brake lights and pedal feel. Check for leaks or other issues with the master cylinder. Lurching and Acceleration Issues 1. Throttle Position Sensor (TPS): A faulty TPS can cause the engine to lurch or hesitate. It might need calibration or replacement. 2. Transmission Problems: Ensure the transmission fluid is at the correct level and consider having the transmission inspected. Rough shifting can sometimes be due to transmission issues rather than engine problems. Recommendations 1. Second Opinion: It’s always a good idea to get a second opinion from another trusted mechanic or an independent VW specialist. This can help ensure you’re not being misled. 2. Detailed Diagnostic: Ask for a comprehensive diagnostic report, including a check of all sensors, fuel system components, and the ECU. 3. Brake System Check: Have the brake system thoroughly checked, including the master cylinder, brake light switch, and related wiring. Good luck, and may your Passat purr like a kitten soon! 🚗💨
Haha, maybe I have a secret twin out there who's also a TH-cam craftsman! But thank you for the comparison, The Essential Craftsman is amazing and I'm honored to be compared to him.
Has anybody checked out their crank shaft sensor and see if it fixes? Debating on doing mine. I just got the tension pulley on a week ago now i have to take it off.
I recently got my camshaft change due to this code, everything was good until two dayss after, the same issue occurred: car shutdown, restart and works. Went to the garage and they couldn't find anything wrong...
Hey good afternoon just got check engine light got codes p0300, p0303 and p0304 just changed spark plugs and ignition coils wires like fine and sometimes when I accelerate car feels like shakes and check engine light blinks
I have a 2010 dodge ram 1500 5.7 I have changed the spark plugs and ignition coils. Still same problems. I have a p0300, 302 and 305 code still and it shakes when i go past 3k rpm
Hi Jesse, It looks like you've done some of the right things already by changing the spark plugs and ignition coils, but since you're still experiencing the P0300 (random/multiple cylinder misfire detected), P0302 (cylinder 2 misfire detected), and P0305 (cylinder 5 misfire detected) codes and shaking past 3000 RPM, let's dig deeper. Check the Fuel Injectors: Misfires can often be caused by faulty fuel injectors. Ensure that the injectors for cylinders 2 and 5 are working properly. You might need to clean them or replace them if they are malfunctioning. I suggest you try a liqui moly fuel injector cleaner. Compression Test: Conduct a compression test on all cylinders. Uneven compression can cause misfires. If the compression is low in cylinders 2 and 5, you might have internal engine issues like worn piston rings or valve problems. Vacuum Leaks: Inspect for vacuum leaks around the intake manifold, hoses, and connections. A vacuum leak can cause a lean condition leading to misfires. Let me know how it goes!
So i have a 2003 subaru outback awd 4 cylider. P0302 code keeps coming back even tho I've changed the ignition coil, wires and spark plugs. Check engine light didnt go off took it back to autozone to use the reader and it now says p0302 as well as p0507... getting frustrated i just want the light to go off! Any ideas what the problem could be?
Hello there, it is a very detailed video! I got my car broken down when driving in traffic (less than 30m/h). Had the check engine, battery and oil alerts. It didn't want to restart. Went to the garage and they changed the camshaft sensor. Worked perfectly fine until 2 days after. It started to shutdown randomly and when i restarted, it was working. Sent to the garage again and they couldn't see any abnormalities in their scans. Then, when driving out of the garage, the car didn't work and the scan said P0302. They checked everything and couldn't find the cause. The spark plugs were with oil, so they cleaned it. And deleted alerts. Drove home and the next day, the car shutdown twice. There is no alerts so nothing was diagnosed. Any help here? They checked everything, air , fuel pressure,. Elantra 2019 2.0L
Hi Lillian. Sorry to hear that. Here is what I think The P0302 code indicates a misfire in cylinder 2, and oil on the spark plugs suggests there might be a valve cover gasket leak or worn piston rings allowing oil into the cylinder, which can cause misfires. Even if the sensor and pressures check out, oil fouling can prevent a proper spark, leading to random shutdowns. Here's what I'd suggest: 1. Inspect valve cover gasket for leaks around cylinder 2. 2. Compression test on cylinder 2 to check for mechanical issues like worn rings. 3. Coil swap: Try swapping the ignition coil with another cylinder to see if the misfire moves. 4. Check wiring to the camshaft and crankshaft sensors, as loose connections can cause intermittent stalls. Intermittent issues can be tricky, so I'd push the garage to focus on these areas.
Replaced spark plugs, coil packs, and cam shaft sensor and it is still experiencing problems.. as well as a fun noise that sounds like something metallic is spinning and something is hitting it sounds like a baseball card in bicycle spokes.. 2011 hyundai elantra.. trying not to put it in the shop.
Hi there, managed to solve the problem? The metallic spinning noise could be a loose or damaged heat shield, a failing alternator bearing, or an issue with the timing belt/chain tensioner. Inspect these areas for any signs of wear or damage. Further diagnostic may be required.
Changed coil pack and spark plugs also all the fuel injectors and still have flashing check engine light and hesitation while accelerating 😥 any other suggestions?
Check the gap on the plugs you put in, that could do it. If it’s running worse than it was before you know 100% it’s something with the plugs, get a spark plug gap tool , and see. Get close to OEM. Sometimes OEM spark plugs are better than “upgraded” irridium or whatever.
I replaced all my spark plugs and coils and mine is still misfiring (2011 Chevy Camaro). When I’ve been driving the car for a while it will struggle to turn on and the same 2-3 coils will stop working :(.
I just replaced everything coils and spark plugs and the car run fine at first it was sputtering and all that other stuff but now it’s running great but I have to crank my car like twice before it actually start up that’s the problem now
Hi Shacora, If your car requires multiple attempts to start even after replacing the coils, spark plugs, and sensors, consider checking the fuel system and battery. Issues like a weak fuel pump, clogged fuel filter, or aging battery can cause starting problems. Ensuring these components are functioning properly might resolve the starting issue. Please let me know if you found the cause.
02 mustang gt runs rough and has p0305 p0001 code even after changing coil packs and wires, ac works intermittently and sometimes car drives perfect then acts up dont know what to do
Hi, Possible causes: 1. Fuel injector issue on cylinder 5 2. Vacuum leak 3. Cam or crank sensor problem 4. AC compressor clutch or electrical issue Suggest having a mechanic diagnose the problem further, as intermittent issues can be tricky to pinpoint. Further testing is needed.
Hi there, Check for vacuum leaks and inspect the fuel injectors. Also, consider testing the downstream O2 sensor and the engine control module (ECM). Let me know how it goes!
I have a 2006 ford ranger , 2.3l with 189k miles . Flashing check engine light . Shaky and drops revs when idling . Could barely make it up a steep hill the other day honestly . It’s my only car and it terrifies me. I changed spark plugs and wires and it didn’t work
@@williamthabang243 well the oil leaking into the exhaust eventually melted a huge hole in it which allows it to make it up hills a lot easier now with more air flos
I keep having a misfire on still in the five in my 2012 Dodge charger V6 and I did my spark plugs and my change my coils and I change injector as well still having the same problem and I have all spark plugs and coils injector-fuel Still having misfire on cylinder five I went to the parts store and did the check engine light and it said 305
Hello there, I have a Toyota Camry 2010. I currently have a misfire on cylinder 3. Its not the ignition coil or spark plug ive swapped them and the misfire remins on 3. The car goes on limp mode when I excell on a large hill or driving on the freeway. My friend told me to change the air filter and clean the mass air flow. I also did fuel additives. That did clear the code on its own however it came back with the same issue only on hills. Not as often now. Any suggestions. Thanks and God bless.
Hi David, Fuel Injectors: Since you've ruled out the ignition coil and spark plug, the next likely culprit could be a clogged or faulty fuel injector on cylinder 3. Try swapping the injector with another cylinder to see if the misfire moves. 2. Compression Check: It's possible that there might be an issue with the engine's internal components. Performing a compression test on all cylinders can help identify if there's a problem with the cylinder itself, such as a bad valve or piston ring. 3. Vacuum Leaks: Check for any vacuum leaks around the intake manifold and vacuum hoses. A vacuum leak can cause a lean condition, especially noticeable under load, such as driving up hills. 4. Wiring and Connectors: Inspect the wiring and connectors going to the fuel injector and ignition coil for cylinder 3. Sometimes a loose or corroded connector can cause intermittent issues.
Thank you for the reply. I purchased a compression kit off Amazon. If that passes I'll just purchase a fuel injector and go from there. The fuel rail is in the back of the engine block making it harder to access. So swapping them is out of the question, at least for me... It's an intimidating job. Thanks again I appreciate it.
@@misaelnegrete1423 my girlfriend took it to a mechanic that her nephew recommended. He checked it out and said it has something to do with the valves and would need engine work or replacement. So currently we are looking for a newer vehicle. I'm not entirely sure I'm convinced. Maybe it's because it's a Toyota... At the same time I'm sick of trying things and I'm not going to throw parts at it and spend a fortune.
@@HonestMechanicChannel I took the the injectors out and got them inspected and cleaned by a trusted shop near me. Misfired right away up a hill. My girlfriend took it to a mechanic and he said it had something to do with the valves. I'm still going to check a couple things. I'm stubborn. But were also looking at a newer car.
Hey, I changed my Hyundai sonata 2017 (2.4 ltr)4 spark plugs and engine oil 2 weeks ago. Now engine light on again and misfiring. And when I brake the car sometimes the engine oil sign comes on the dashboard. My neighbor tech checked it today and he said it's not a spark plug problem now. He said the car may be misfiring because the motor is leaking engine oil from the spark plug. And he suggested to change the engine but the engine is expensive 😢 I don't have that much money to change the new engine at this moment. Should I change the engine for this misfire? Are there any other options to resolve this at least for six months?😞 Option to fix at least for 6 months 😞
I have a 2010 jeep patriot 2.4l I changed the spark plugs, ignition coil, and injectors. I'm still having a misfire in cylinder 3. I got to doing some reading on it and it said it could be the pcm so I changed it. Still having the issue. I also changed the valve cover gaskets as cylinder 3 had a little oil on the spark plug. After doing all of this, I noticed it's been white smoking until it warms up and it goes away. Is that the head gasket that's causing all of this?
Your 2010 Jeep Patriot's persistent cylinder 3 misfire, even after replacing spark plugs, ignition coil, injectors, PCM, and valve cover gaskets, along with the appearance of white smoke that disappears when the engine warms up, strongly indicates a head gasket issue. The head gasket might be leaking coolant into the cylinder, causing the misfire and white smoke. A compression test or leak-down test can confirm if the head gasket is the culprit. Also you can try a head gasket additive and see if that fixes your problem. Hope this is helpful
Hi, I have a really frustrating problem I have to take my car to the dealer every 2 days Mercedes cla 250. They changed the spark plugs and ignition coils twice. Today they changed the fuel injector supposedly it was clogged. Drove the car 30 minutes after picking it up and started shaking horrendously and the engine started gurgling. Now it’s giving me a p0302 code when back then it would consistently give me the p0304 code for cylinder 4 misfire. Now it’s saying cylinder 2. How do I get to the bottom of it. They keep fixing it and it keeps giving the same issue
Hi Kamlya, Sorry to hear you experiencing this. . Given the changes in error codes from P0304 (cylinder 4 misfire) to P0302 (cylinder 2 misfire), the problem might not be with individual spark plugs or coils. Here’s a strategic approach: Compression Test: Request a compression test on all cylinders to check for any mechanical issues that might be causing the misfire. Fuel System Cleaning: Since a clogged injector was mentioned, consider a full fuel system cleaning. Sometimes, more than one injector could be affected. ECU Check: Ask the dealer to check the Engine Control Unit (ECU) for any software issues or the need for updates. Seek a Second Opinion: If the dealer continues to struggle with diagnosis, consider taking your vehicle to an independent specialist with a good reputation for working on Mercedes. Persistent issues like this can be challenging, but a thorough check of the systems involved should help in pinpointing and resolving the underlying cause. Really hope this helps
A bad battery could cause misfire as well. A poor battery could cause miscalculated fuel, injectors opening improperly etc. At least that was what I finally found out after going through the process it was the dang battery
Ok. I’m following up with my last post. After I replaced the spark plugs coils. I replaced the fuel injections to get rid of my idle shake. Now it’s giving me P0172 code. 😢
Just had ALL 6 spark plugs & coils changed. A week later. Check engine light comes back on and is running rough, loss of power and sputtering. Rpm is off too...🤦🏽
Hi there, Sorry to hear that. If your vehicle is running rough with a loss of power, sputtering, and incorrect RPM readings shortly after replacing all spark plugs and coils, it's likely due to incorrect installation, faulty new parts, or unrelated issues like a vacuum leak or fuel delivery problems. Do you have an OBD Scanner?
Hello Again Honest Mechanic!! I had my car checked today. The scan tool read 6 codes. P0300, P0301, P0303, P0305, P1346, & P1349. Got bank 1&2 'solenoids' replaced. Both where bad. New 'spark plugs' & 'ignition coils' . Looks like it might be the 'camshaft position sensors' and/or 'oil control valve filters'....What do you think?! @@HonestMechanicChannel
Hey I had a oil leak in my valve gasket and cause shaking vibrations and misfire In cylinder 4 so I changed all for sparks and 1 coil it stop the shake and vibration and jerk but it still jerks not a lot tho
Hi @mooniivlogs, Dealing with an oil leak in the valve gasket that led to a misfire in cylinder 4, and then replacing the spark plugs and a coil to remedy shaking and vibrations is a good step. However, if you're still experiencing jerking, albeit reduced, there are a few possible causes to consider: Remaining Oil Contamination: If oil leaked into the spark plug wells due to the valve gasket issue, it might have contaminated the ignition coil or other spark plugs. Even though you've replaced one coil and all spark plugs, there could still be some residual contamination affecting the ignition system.
@@HonestMechanicChannel so there’s oil in the cylinders and I needed a new valve cover and 2 new coils and mechanic shop said he’s gonna clean out the oil
i’m having a problem just like this but when i would slow down it would turn off .. i got my valve gasket cleaned and replaced all new sparks on my 4 cylinder and 4 new coils and it’s not going it as much now but still happens when i slow down or stop .. can you please help
Week ago a friend sent me a P0301 from her G37. Today, I replaced the ignition coil, car still ran rough. Put the original coil back, changed cylinder 1 spark plug, still ran like shit. Scanned the codes again today after changing the plug, P0300 came up. So I replaced all 6 spark plugs. Still misfiring.
Im using Renault clio 2 , 2005 model, engine 1.2. Ive changed spark plugs, coil pack, etc but it still misfires.😢 when im driving fast it doesnt but the minute i start driving slow, it misfires. in that start i part and let it cool down and drive again fast ... Im so tired of it and with no solution yohh its a problem. please help out.
Troubleshooting a po302 on my 2006 Subaru sti. Did so far. Swap plugs,ignition coil,fuel injector, vacuum leak check front and rear,,compression and leakdown test. Tested crankshaft and camshaft position sensor good and cleaned. What next??? Oh and checked , tested mad sensor
Hi, If your car is "jumping" or shaking after changing the spark plugs and coil, it could be due to improper installation, a mismatch in spark plug specifications, or a faulty coil. Ensure everything is installed correctly and matches your car's specifications.
I was starting my car cranking the. Suddenly the ignition coils won’t fire, all 4 stopped at the same time. 08 Camry All fuses looks okay, when I start the car now, I only hear the car turning
Based on your description, it seems like there may be an issue with the ignition system, specifically related to the ignition coils not firing. Here are a few potential causes: 1. Ignition control module: If all four coils stopped firing simultaneously, the ignition control module (ICM) might be faulty. The ICM is responsible for sending the signal to the coils to fire. 2. Wiring issue: Check for any damaged, loose, or corroded wiring connections between the ICM and the coils, as well as between the coils and the spark plugs. 3. Crankshaft position sensor: A faulty crankshaft position sensor can cause the ignition system to fail, as it helps determine the timing of the ignition and fuel injection. 4. Camshaft position sensor: Similar to the crankshaft position sensor, a failing camshaft position sensor can also cause ignition issues. 5. Security system issue: In some cases, a malfunctioning security system can cause the ignition to be disabled. Since all four coils stopped firing at the same time, it's more likely to be an issue with a common component like the ICM or a sensor, rather than individual coil problems. To diagnose the issue, you may need to use a scanner to check for any diagnostic trouble codes (DTCs) and perform further testing on the ignition system components. Consider having a professional mechanic inspect your vehicle if you are not comfortable with performing these tests yourself.
Did that . Last I found out the injectors were dirty . Fix them and all is good .
Thanks for the comment, glad you managed to sort it out!
Was the check engine flashing
@@JoeyGonzales-yl4timine is
What is an injector? Is that the valve?
I hv a new injectors but still do that again
It's unfortunate most shops now want the biggest money rip and always say engine rebuild or some similar $8,000 repair. I went from zero experience to doing almost all maintenance on my car after the last repair quote at a trusted "independent" shop was $11,5000 and it was just a clogged filter. Too bad trust is gone.
Transmission changed for me $3,700. It was a fuel filter. I felt violated.
Cylinder 1 misfire in a 2012 Volkswagen Passat SE, replaced the spark plug and the ignition coil. The check engine light went from a solid orange light (pre-fix) to a flashing orange light (post-fix). Only code that had came up on my OBD scanner was P0301. Not entirely quite sure what the issue is with it, as the coils/plugs were brand new straight from the box and didn't show signs of anything faulty with them. Ran through possible outcomes before putting them in to make sure nothing would go wrong with the process, so I'm really at quite a loss as to what to do here.
A flashing check engine light after replacing the spark plug and ignition coil for a cylinder 1 misfire (P0301 code) on your 2012 Volkswagen Passat SE usually indicates a more serious misfire that could damage the catalytic converter. Since you've already replaced the spark plug and ignition coil without resolving the issue, consider the following steps:
Check Installation: Double-check the installation of the new spark plug and ignition coil to ensure they are properly seated and connected.
Inspect Fuel Injector: The problem might be with the fuel injector of cylinder 1. A clogged or faulty injector can cause misfires. Check for proper operation or signs of clogging.
Compression Test: Perform a compression test on cylinder 1. Low compression can result from issues like a blown head gasket, worn piston rings, or valve problems, leading to misfires.
Examine Wiring and Connectors: Check the wiring and connectors leading to the ignition coil and fuel injector for cylinder 1. Damaged wires or loose connections can cause misfires.
Vacuum Leaks: A vacuum leak in the intake manifold can lead to misfires, especially if it's near cylinder 1. Listen for hissing sounds and check for leaks using a smoke test if necessary.
Check the Engine Control Module (ECM): Rarely, the issue could be with the ECM itself. Ensure the software is up to date and check for any signs of ECM malfunction.
@HonestMechanicChannel I'll check these out and see if anything fixes. Appreciate the reply!
I recently got new cat fitted, 3 weeks later it was throwing a code p0420 and p0303, now its just showing p0303 , i changed coils and plugs, plugs were really bad, which i was surprised at as it was only 2 years ago i got new 1s fitted, but 1 had almost like crazy build up that almost looked like stones, stuck round the thread and another had tiny bit of oil on it, so i replaced them with new1s, hoping that would fix it but code came back in no time, theres no sign of head gasket leaks and under the oil cap is clean, the coolant looks fine also, tbh i was shocked at how bad 1 of the plugs were, so its prob on its way out if looking like that, but surprisingly the really bad spark plug was in cylinder 1 but i have p0303 code which was weird. My revs are not jumping, my exhaust is sputtering at the rear, its a celica 2001 vvtli, im gonna try clean the injectors to see if that is the problem but im losing my mind, just want my car back with power😅
Having the identical problem with an 04 impala. Really driving me nuts can't figure it out
@@michaeldawson6141 I returned and swapped out the new ignition coils and spark plugs after finding out that sometimes they bust in the packaging, didn't have issues with the new pieces.
2014 z71 replaced packs plugs and wires drove it a 8 miles with little to no shimmy sounded good it sat over night and then I get a flashing check engine light
Hi Steven. Did you manage to solve the problem? Since the light started flashing after replacing the ignition coils (packs), plugs, and wires, it's possible there's an issue with the installation, a defective part, or another underlying engine problem that wasn't addressed by the replacements. It's important to read the diagnostic trouble codes (DTCs) with an OBD-II scanner to pinpoint the exact cause. Given the situation, it's advisable to avoid driving the vehicle until it's been inspected and repaired to prevent further damage.
@@HonestMechanicChannel after replacement still got multiple misfires cyl 1357 changing out my o2 censors then going back to drawing board
Same with my dodge 07 hemi. Drove 1.6 miles boo no shake but flashing light
@@AtwoodBoxing replace both bank 1 o2 sensors your flashing light is a multiple misfire all on one side I bet ,mine was 1,3,5and 7
When I was a child doctors used to ask: "when/how did it start happening?" 🙄 Doesn’t how or when the problem started to happen make a difference in the diagnostic?
I have a 20 year old Volvo s40 with 120,000 miles which looks like it just came out of the dealer!
It was running great until… getting on a freeway had a bad truck driver coming really fast which forced me to accelerate really hard… it got me out of trouble but when I got home the engine light started flashing and the car sounded and felt like misfiring. I have another car so I stopped driving it since I learned it could make it worse. I replaced the spark plugs and coils and the catalytic converter which was the original and really needed to be replaced; however, nothing stopped the flashing light but when I think about it in my case what are the chances that the hard acceleration could've caused the plug wires or spark plugs go bad? They were not old before anyway and I’ve always replaced everything I can with original Volvo parts! So I’m afraid I have to think the worse that could’ve happened… sadly since I bought this car originally in 2003 and used it to take my son to school.. wanted to keep it but now I doubt I’ll be able to.. any ideas pls welcome!
2014 Grandcherokee Summit, cylinder 3 / multiple misfire, replaced SPARK PLUGS, COILS and FUEL INJECTORS on all 6 cylinder, engine ride/idle quiet, ENGINE LIGHT BACK ON, any idea on my issue?
Is saw another video saying if you remove it you got it got to reprogram /relearn it for it to work. Did you have to do that?
Great Vid by the way. I subbed. I need car info all the time
Thanks for the information. I have a problem I am hoping you can shed some light on. I had engine misfire and replaced all. the coils and spark plugs. The misfire went away. Also have a new fuel filter. Six months later, I am experiencing a random misfire. Sometimes the car runs perfectly, and all of the sudden it misfires for a few seconds. Sometimes the "Service engine light soon" flashes on and off during the misfire. Then it goes back to running ok. I have poured motor treatment liquids to see if cleaned injectors and the such. Once it misfires, I can detect a P0300 code and troubleshooting this has been difficult. I do not get more specific codes. 2003 GMC Envoy XL 4.2L 6 Cyl. Any thoughts?
Hi, my pleasure. Experiencing random misfires in your 2003 GMC Envoy XL 4.2L 6 Cyl after replacing coils, spark plugs, and fuel filter suggests several potential issues. Given that the misfire seems intermittent and triggers a P0300 code without more specific fault codes, consider the following areas for further diagnosis:
Fuel System: Despite a new fuel filter, issues with fuel pressure (fuel pump problem or clogged fuel injectors) can cause random misfires. Using motor treatment liquids might not fully clean clogged injectors.
Electrical Connections: Loose or corroded electrical connections to the coils or spark plugs can cause intermittent issues.
Vacuum Leaks: A vacuum leak in the intake manifold gasket or vacuum hoses can lead to misfires, especially noticeable at idle or low-speed operation.
Catalytic Converter: A partially blocked catalytic converter can sometimes cause random misfires due to restricted exhaust flow.
Crankshaft or Camshaft Position Sensor: Faulty sensors can lead to misfires as they provide critical timing information to the engine's control unit.
Given the complexity and range of possible causes, a thorough diagnostic approach is necessary. Consider having the fuel system pressure tested, inspecting all electrical connections for tightness and corrosion, checking for vacuum leaks with a smoke test, and testing or scanning for issues with the crankshaft and camshaft position sensors. A diagnostic tool capable of real-time data monitoring might help pinpoint the issue more effectively by observing engine parameters during a misfire event.
im changing the spark plugs on the driver side i have a misfire diagnosed on that side of my suburau legacy 06 i hope that is the problem
Yeah spark plugs are usually the best play to start when you have a misfire, please let me know how it goes !
Thanks for this Vid...Very much Appreciated👍🏻
Glad it was helpful!
I did all those steps and the pressure of the 3 front cylinders does have low pressure, what do I need to do next? It's a 2005 Santa Fe V6 3.5
I have a 2010 Chevy Tahoe. Shakes when driving and sometimes when holding down on brake.shakes more between 20mph-40mph.if I go past 40mph it seems to calm down.
Most Likely The Fuel Injectors
2013 Infiniti m37xs ....changed spark plugs, coils, timing belt, it idles fine but has no good power when driving, codes are p0300 and p0305...no check engine light but when put the scanner it says permanent stored codes. Please help
I have a 2016 BMW X5, replaced the spark plugs and coils. Now its showing codes of misfire P308 and P304. My car shakes. Please advise thank you
Did you find out what it was??
They were faulty spark plugs this happen more often then peope think including myself lol double check what gap your car spark plugs need to be (usually on a white label under your hood) and go to AutoZone get some with the same gap and they should be good.
I changed all spark plugs and ignition coils to my Mazda 15. engine light went off 2nd day. Came back on 3rd day. Car drives fine. Only when it’s started and brakes on it does the misfire shake. What could this be?
Omg me too ,2014 charger
I have the same problem with my Mazda 3. Did you find out?
Well I replaced the fuel injectors. Now I’m getting P-0172 rear bank to rich. I looked that up and it of course says multiple things. Like O2 censor.
@@w.d.gaster8872 damn, maybe it's not worth to repair then. Was the previous code P030X?
Clean your throttle body, check your air filter and make sure your spark plugs and ignition hardness wires are good and that should fix it. Especially cleaning the throttle body makes a big difference !
replaced all coils, and spark plugs on 2010 passat. random misfire and misfire on all 4 cyls randomly, mostly on cold startup. brake lights also dont activate until pedal is pressed .5-1 inch. engine runs rough from stand still unless i press the gas just enough but not too much or it lurches harder than it does when i dont press the gas. the local vw dealer did a shit job of diagnosing and charged me $600 to tell me they didnt know what was wrong with the brakes and said i needed new coils and spark plugs AGAIN
It sounds like you’ve got a real conundrum with your 2010 Passat. Let’s break down the potential issues and solutions:
Misfires and Engine Roughness
1. Vacuum Leaks: Check for any vacuum leaks. These can cause misfires and rough idling, especially when the engine is cold.
2. Fuel System Issues: Ensure the fuel injectors are clean and working properly. A clogged or malfunctioning injector can cause misfires.
3. ECU Problems: The engine control unit (ECU) might need reprogramming or replacement. Sometimes, software issues can lead to random misfires.
4. Mass Air Flow (MAF) Sensor: A faulty MAF sensor can cause erratic engine behavior. Cleaning or replacing it might help.
Brake Lights and Pedal Response
1. Brake Light Switch: The brake light switch might be faulty or incorrectly adjusted. It’s located near the brake pedal and can be adjusted to activate the lights with less pedal travel.
2. Master Cylinder: If there’s an issue with the master cylinder, it might affect both the brake lights and pedal feel. Check for leaks or other issues with the master cylinder.
Lurching and Acceleration Issues
1. Throttle Position Sensor (TPS): A faulty TPS can cause the engine to lurch or hesitate. It might need calibration or replacement.
2. Transmission Problems: Ensure the transmission fluid is at the correct level and consider having the transmission inspected. Rough shifting can sometimes be due to transmission issues rather than engine problems.
Recommendations
1. Second Opinion: It’s always a good idea to get a second opinion from another trusted mechanic or an independent VW specialist. This can help ensure you’re not being misled.
2. Detailed Diagnostic: Ask for a comprehensive diagnostic report, including a check of all sensors, fuel system components, and the ECU.
3. Brake System Check: Have the brake system thoroughly checked, including the master cylinder, brake light switch, and related wiring.
Good luck, and may your Passat purr like a kitten soon! 🚗💨
This sounds EXACTLY like The Essential Craftsman. I swear it’s the same guy.
Haha, maybe I have a secret twin out there who's also a TH-cam craftsman! But thank you for the comparison, The Essential Craftsman is amazing and I'm honored to be compared to him.
So if it’s not the spark plugs or the spark plug wires trade the car in for whatever you can get for it… Got it.
Has anybody checked out their crank shaft sensor and see if it fixes? Debating on doing mine. I just got the tension pulley on a week ago now i have to take it off.
I recently got my camshaft change due to this code, everything was good until two dayss after, the same issue occurred: car shutdown, restart and works. Went to the garage and they couldn't find anything wrong...
I changed my spark plugs and wires today , and now my car stalls when starting up and cuts off.
Are you sure the wires are in the right spot from distributor to each cylinder?
Did u find the issue?
May have to change engine oil also . Refill oil with new oil and oil filter
@@diydcappa that won’t affect her problem though.
What was your resolve? I'm having a similar issue...
Hey good afternoon just got check engine light got codes p0300, p0303 and p0304 just changed spark plugs and ignition coils wires like fine and sometimes when I accelerate car feels like shakes and check engine light blinks
I have the same problem except I get codes p0302, p0306, p0308. I also am getting a weak battery reading.
@@richardeisele7016same
If I already changed my spark plug and spark plug wire is it possible that my fuel injectors are bad? It only misfires in cylinder 2 after hot restart
I’m have the same problems on cylinders 3 goes into limp mode as well
I have a 2010 dodge ram 1500 5.7
I have changed the spark plugs and ignition coils. Still same problems.
I have a p0300, 302 and 305 code still and it shakes when i go past 3k rpm
Hi Jesse, It looks like you've done some of the right things already by changing the spark plugs and ignition coils, but since you're still experiencing the P0300 (random/multiple cylinder misfire detected), P0302 (cylinder 2 misfire detected), and P0305 (cylinder 5 misfire detected) codes and shaking past 3000 RPM, let's dig deeper.
Check the Fuel Injectors: Misfires can often be caused by faulty fuel injectors. Ensure that the injectors for cylinders 2 and 5 are working properly. You might need to clean them or replace them if they are malfunctioning. I suggest you try a liqui moly fuel injector cleaner.
Compression Test: Conduct a compression test on all cylinders. Uneven compression can cause misfires. If the compression is low in cylinders 2 and 5, you might have internal engine issues like worn piston rings or valve problems.
Vacuum Leaks: Inspect for vacuum leaks around the intake manifold, hoses, and connections. A vacuum leak can cause a lean condition leading to misfires.
Let me know how it goes!
So i have a 2003 subaru outback awd 4 cylider. P0302 code keeps coming back even tho I've changed the ignition coil, wires and spark plugs. Check engine light didnt go off took it back to autozone to use the reader and it now says p0302 as well as p0507... getting frustrated i just want the light to go off! Any ideas what the problem could be?
Hello there, it is a very detailed video! I got my car broken down when driving in traffic (less than 30m/h). Had the check engine, battery and oil alerts. It didn't want to restart. Went to the garage and they changed the camshaft sensor. Worked perfectly fine until 2 days after. It started to shutdown randomly and when i restarted, it was working. Sent to the garage again and they couldn't see any abnormalities in their scans. Then, when driving out of the garage, the car didn't work and the scan said P0302. They checked everything and couldn't find the cause. The spark plugs were with oil, so they cleaned it. And deleted alerts. Drove home and the next day, the car shutdown twice. There is no alerts so nothing was diagnosed. Any help here? They checked everything, air , fuel pressure,. Elantra 2019 2.0L
Hi Lillian. Sorry to hear that. Here is what I think The P0302 code indicates a misfire in cylinder 2, and oil on the spark plugs suggests there might be a valve cover gasket leak or worn piston rings allowing oil into the cylinder, which can cause misfires. Even if the sensor and pressures check out, oil fouling can prevent a proper spark, leading to random shutdowns.
Here's what I'd suggest:
1. Inspect valve cover gasket for leaks around cylinder 2.
2. Compression test on cylinder 2 to check for mechanical issues like worn rings.
3. Coil swap: Try swapping the ignition coil with another cylinder to see if the misfire moves.
4. Check wiring to the camshaft and crankshaft sensors, as loose connections can cause intermittent stalls.
Intermittent issues can be tricky, so I'd push the garage to focus on these areas.
i kkep getting code 92314 and p0305 I already changed the coils and plug and still getting a vibration and a stutter at certain speeds. only on cyl. 5
Replaced spark plugs, coil packs, and cam shaft sensor and it is still experiencing problems.. as well as a fun noise that sounds like something metallic is spinning and something is hitting it sounds like a baseball card in bicycle spokes.. 2011 hyundai elantra.. trying not to put it in the shop.
Hi there, managed to solve the problem? The metallic spinning noise could be a loose or damaged heat shield, a failing alternator bearing, or an issue with the timing belt/chain tensioner. Inspect these areas for any signs of wear or damage. Further diagnostic may be required.
Can't check with a screw driver any more everything shoved into the motor nowadays 😂
Changed coil pack and spark plugs also all the fuel injectors and still have flashing check engine light and hesitation while accelerating 😥 any other suggestions?
Check the gap on the plugs you put in, that could do it. If it’s running worse than it was before you know 100% it’s something with the plugs, get a spark plug gap tool , and see. Get close to OEM. Sometimes OEM spark plugs are better than “upgraded” irridium or whatever.
I replaced all my spark plugs and coils and mine is still misfiring (2011 Chevy Camaro). When I’ve been driving the car for a while it will struggle to turn on and the same 2-3 coils will stop working :(.
I just replaced everything coils and spark plugs and the car run fine at first it was sputtering and all that other stuff but now it’s running great but I have to crank my car like twice before it actually start up that’s the problem now
Oh and I replaced all sensors maybe it’s something else but it’s just the starting up for me. Now
Hi Shacora, If your car requires multiple attempts to start even after replacing the coils, spark plugs, and sensors, consider checking the fuel system and battery. Issues like a weak fuel pump, clogged fuel filter, or aging battery can cause starting problems. Ensuring these components are functioning properly might resolve the starting issue.
Please let me know if you found the cause.
02 mustang gt runs rough and has p0305 p0001 code even after changing coil packs and wires, ac works intermittently and sometimes car drives perfect then acts up dont know what to do
Hi, Possible causes:
1. Fuel injector issue on cylinder 5
2. Vacuum leak
3. Cam or crank sensor problem
4. AC compressor clutch or electrical issue
Suggest having a mechanic diagnose the problem further, as intermittent issues can be tricky to pinpoint. Further testing is needed.
Show where these components are on engine
Changed coils and spark plugs, upstream O2 sensor and still get P2A00, P0304, plus P0300 ?
Hi there, Check for vacuum leaks and inspect the fuel injectors. Also, consider testing the downstream O2 sensor and the engine control module (ECM). Let me know how it goes!
I have a 2006 ford ranger , 2.3l with 189k miles . Flashing check engine light . Shaky and drops revs when idling . Could barely make it up a steep hill the other day honestly . It’s my only car and it terrifies me.
I changed spark plugs and wires and it didn’t work
Ford focus 1.6 2013 same problem
@@williamthabang243 well the oil leaking into the exhaust eventually melted a huge hole in it which allows it to make it up hills a lot easier now with more air flos
I keep having a misfire on still in the five in my
2012 Dodge charger V6 and I did my spark plugs and my change my coils and I change injector as well still having the same problem and I have all spark plugs and coils injector-fuel
Still having misfire on cylinder five I went to the parts store and did the check engine light and it said 305
Having the same problem
Done all what you said done and still 5 cylinder
My 2021gmc serra slt 1500 had a flashing check engine light found out it was camshaft and lifters..
Hello there, I have a Toyota Camry 2010. I currently have a misfire on cylinder 3. Its not the ignition coil or spark plug ive swapped them and the misfire remins on 3. The car goes on limp mode when I excell on a large hill or driving on the freeway. My friend told me to change the air filter and clean the mass air flow. I also did fuel additives. That did clear the code on its own however it came back with the same issue only on hills. Not as often now. Any suggestions. Thanks and God bless.
Hi David, Fuel Injectors: Since you've ruled out the ignition coil and spark plug, the next likely culprit could be a clogged or faulty fuel injector on cylinder 3. Try swapping the injector with another cylinder to see if the misfire moves.
2. Compression Check: It's possible that there might be an issue with the engine's internal components. Performing a compression test on all cylinders can help identify if there's a problem with the cylinder itself, such as a bad valve or piston ring.
3. Vacuum Leaks: Check for any vacuum leaks around the intake manifold and vacuum hoses. A vacuum leak can cause a lean condition, especially noticeable under load, such as driving up hills.
4. Wiring and Connectors: Inspect the wiring and connectors going to the fuel injector and ignition coil for cylinder 3. Sometimes a loose or corroded connector can cause intermittent issues.
Thank you for the reply. I purchased a compression kit off Amazon. If that passes I'll just purchase a fuel injector and go from there. The fuel rail is in the back of the engine block making it harder to access. So swapping them is out of the question, at least for me... It's an intimidating job. Thanks again I appreciate it.
I have a 08 Camry and have the same issue, car rattles too. Did you end up finding out what the issue was?
@@misaelnegrete1423 my girlfriend took it to a mechanic that her nephew recommended. He checked it out and said it has something to do with the valves and would need engine work or replacement. So currently we are looking for a newer vehicle. I'm not entirely sure I'm convinced. Maybe it's because it's a Toyota... At the same time I'm sick of trying things and I'm not going to throw parts at it and spend a fortune.
@@HonestMechanicChannel I took the the injectors out and got them inspected and cleaned by a trusted shop near me. Misfired right away up a hill. My girlfriend took it to a mechanic and he said it had something to do with the valves. I'm still going to check a couple things. I'm stubborn. But were also looking at a newer car.
I did wires and plugs still misfiring. Ended up being the ignition coil.
Hey, I changed my Hyundai sonata 2017 (2.4 ltr)4 spark plugs and engine oil 2 weeks ago. Now engine light on again and misfiring. And when I brake the car sometimes the engine oil sign comes on the dashboard.
My neighbor tech checked it today and he said it's not a spark plug problem now. He said the car may be misfiring because the motor is leaking engine oil from the spark plug. And he suggested to change the engine but the engine is expensive 😢 I don't have that much money to change the new engine at this moment.
Should I change the engine for this misfire? Are there any other options to resolve this at least for six months?😞
Option to fix at least for 6 months 😞
Same situation as you...let me know if you change the engine
I have a 2010 jeep patriot 2.4l I changed the spark plugs, ignition coil, and injectors. I'm still having a misfire in cylinder 3. I got to doing some reading on it and it said it could be the pcm so I changed it. Still having the issue. I also changed the valve cover gaskets as cylinder 3 had a little oil on the spark plug. After doing all of this, I noticed it's been white smoking until it warms up and it goes away. Is that the head gasket that's causing all of this?
Your 2010 Jeep Patriot's persistent cylinder 3 misfire, even after replacing spark plugs, ignition coil, injectors, PCM, and valve cover gaskets, along with the appearance of white smoke that disappears when the engine warms up, strongly indicates a head gasket issue. The head gasket might be leaking coolant into the cylinder, causing the misfire and white smoke. A compression test or leak-down test can confirm if the head gasket is the culprit. Also you can try a head gasket additive and see if that fixes your problem.
Hope this is helpful
@@HonestMechanicChannel thank you
Hi, I have a really frustrating problem I have to take my car to the dealer every 2 days Mercedes cla 250. They changed the spark plugs and ignition coils twice. Today they changed the fuel injector supposedly it was clogged. Drove the car 30 minutes after picking it up and started shaking horrendously and the engine started gurgling. Now it’s giving me a p0302 code when back then it would consistently give me the p0304 code for cylinder 4 misfire. Now it’s saying cylinder 2. How do I get to the bottom of it. They keep fixing it and it keeps giving the same issue
Hi Kamlya, Sorry to hear you experiencing this. . Given the changes in error codes from P0304 (cylinder 4 misfire) to P0302 (cylinder 2 misfire), the problem might not be with individual spark plugs or coils. Here’s a strategic approach:
Compression Test: Request a compression test on all cylinders to check for any mechanical issues that might be causing the misfire.
Fuel System Cleaning: Since a clogged injector was mentioned, consider a full fuel system cleaning. Sometimes, more than one injector could be affected.
ECU Check: Ask the dealer to check the Engine Control Unit (ECU) for any software issues or the need for updates.
Seek a Second Opinion: If the dealer continues to struggle with diagnosis, consider taking your vehicle to an independent specialist with a good reputation for working on Mercedes.
Persistent issues like this can be challenging, but a thorough check of the systems involved should help in pinpointing and resolving the underlying cause. Really hope this helps
A bad battery could cause misfire as well. A poor battery could cause miscalculated fuel, injectors opening improperly etc. At least that was what I finally found out after going through the process it was the dang battery
@@bossone1216 yeah that May be it. Cylinders keep misfiring after fixing it and replacing spark plugs and coils
Ok. I’m following up with my last post. After I replaced the spark plugs coils. I replaced the fuel injections to get rid of my idle shake. Now it’s giving me P0172 code. 😢
Just had ALL 6 spark plugs & coils changed. A week later. Check engine light comes back on and is running rough, loss of power and sputtering. Rpm is off too...🤦🏽
Hi there, Sorry to hear that. If your vehicle is running rough with a loss of power, sputtering, and incorrect RPM readings shortly after replacing all spark plugs and coils, it's likely due to incorrect installation, faulty new parts, or unrelated issues like a vacuum leak or fuel delivery problems. Do you have an OBD Scanner?
Hello Again Honest Mechanic!!
I had my car checked today.
The scan tool read 6 codes. P0300, P0301, P0303, P0305, P1346, & P1349. Got bank 1&2 'solenoids' replaced. Both where bad. New 'spark plugs' & 'ignition coils' . Looks like it might be the 'camshaft position sensors' and/or 'oil control valve filters'....What do you think?! @@HonestMechanicChannel
@@HonestMechanicChannel P.S. Today my car ran pretty smooth. Unlike yesterday. Initial start was hard though🤷🏽
Did you het her fixed up?
No, still misfiring bank 1.@@drakescott489
Hey I had a oil leak in my valve gasket and cause shaking vibrations and misfire In cylinder 4 so I changed all for sparks and 1 coil it stop the shake and vibration and jerk but it still jerks not a lot tho
Hi @mooniivlogs, Dealing with an oil leak in the valve gasket that led to a misfire in cylinder 4, and then replacing the spark plugs and a coil to remedy shaking and vibrations is a good step. However, if you're still experiencing jerking, albeit reduced, there are a few possible causes to consider:
Remaining Oil Contamination: If oil leaked into the spark plug wells due to the valve gasket issue, it might have contaminated the ignition coil or other spark plugs. Even though you've replaced one coil and all spark plugs, there could still be some residual contamination affecting the ignition system.
@@HonestMechanicChannel so there’s oil in the cylinders and I needed a new valve cover and 2 new coils and mechanic shop said he’s gonna clean out the oil
Did you find a fix?
Did this ever get fixed
i’m having a problem just like this but when i would slow down it would turn off .. i got my valve gasket cleaned and replaced all new sparks on my 4 cylinder and 4 new coils and it’s not going it as much now but still happens when i slow down or stop .. can you please help
Week ago a friend sent me a P0301 from her G37. Today, I replaced the ignition coil, car still ran rough. Put the original coil back, changed cylinder 1 spark plug, still ran like shit. Scanned the codes again today after changing the plug, P0300 came up. So I replaced all 6 spark plugs. Still misfiring.
Im using Renault clio 2 , 2005 model, engine 1.2. Ive changed spark plugs, coil pack, etc but it still misfires.😢 when im driving fast it doesnt but the minute i start driving slow, it misfires. in that start i part and let it cool down and drive again fast ... Im so tired of it and with no solution yohh its a problem. please help out.
I'm having a similar problem with my 2010 3.6r Outback. How long has the problem persisted for you?
When you start to get into all this mess clear the code and immediately go trade it in that simple not worth putting the money into it
Another option to consider. I appreciate your thoughts
Ripping others off aint me personally
Many codes like a P0302 for example may be permanent. But you are right. These problems can be very expensive to diagnose and few mechanics know how.
Troubleshooting a po302 on my 2006 Subaru sti. Did so far. Swap plugs,ignition coil,fuel injector, vacuum leak check front and rear,,compression and leakdown test. Tested crankshaft and camshaft position sensor good and cleaned. What next??? Oh and checked , tested mad sensor
@@PeterHernandez-lg2eh pcv valve lol fuel pump who knows😂
It would help if the video didn't turn blank
Hey Atwood, thanks for letting me know, apologies for that, made an editing error.
I change spark plug and coil and when I’m parked the car be jumping
Hi, If your car is "jumping" or shaking after changing the spark plugs and coil, it could be due to improper installation, a mismatch in spark plug specifications, or a faulty coil. Ensure everything is installed correctly and matches your car's specifications.
I was starting my car cranking the. Suddenly the ignition coils won’t fire, all 4 stopped at the same time. 08 Camry
All fuses looks okay, when I start the car now, I only hear the car turning
Based on your description, it seems like there may be an issue with the ignition system, specifically related to the ignition coils not firing. Here are a few potential causes:
1. Ignition control module: If all four coils stopped firing simultaneously, the ignition control module (ICM) might be faulty. The ICM is responsible for sending the signal to the coils to fire.
2. Wiring issue: Check for any damaged, loose, or corroded wiring connections between the ICM and the coils, as well as between the coils and the spark plugs.
3. Crankshaft position sensor: A faulty crankshaft position sensor can cause the ignition system to fail, as it helps determine the timing of the ignition and fuel injection.
4. Camshaft position sensor: Similar to the crankshaft position sensor, a failing camshaft position sensor can also cause ignition issues.
5. Security system issue: In some cases, a malfunctioning security system can cause the ignition to be disabled.
Since all four coils stopped firing at the same time, it's more likely to be an issue with a common component like the ICM or a sensor, rather than individual coil problems.
To diagnose the issue, you may need to use a scanner to check for any diagnostic trouble codes (DTCs) and perform further testing on the ignition system components. Consider having a professional mechanic inspect your vehicle if you are not comfortable with performing these tests yourself.
Change coil
I sprayed around the intake and the RPM just dropped almost killing the engine for just a couple of seconds.
Anyone please help😂
Crank shaft sensor?
Nissan vehicles may not be that good anymore