Could My Hemi Engine Fault Code P0305 Be Caused By A Faulty Fuel Injector?
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- เผยแพร่เมื่อ 21 ก.ย. 2022
- I'm running out of ideas to fix my 2010 Ram Engine Fault Code. The next step will be Expensive!
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Hey, I know this didn't go how you hoped, but just wanted to say thank you. I had a P0302 code. Checked wiring, swapped Coil packs between 2 and 4. Swapped plugs. Finally a new Fuel Injector did it. Way smoother. Not perfect, maybe build up? But the code never returned and it really is night and day. Your video was key for me with zero experience of any kind.
So, thank you.
Hopefully you remember, when you had that code and you changed the plugs, when you idled did it sound weird, having this issue and swapped the plugs with the same code and hoping to try this next
You have way more patience than I do with all that electrical troubleshooting. I'd have given up long ago and taken it to a shop.
Feel for you Scott. Been watching a lot of your videos. I remember your timing chain/ valve failure. Hang in there. 4 months ago I replaced my camshaft and lifters in my 17 ram 1500 after failure. Went through all of the diagnosis of swapping things to no avail. Was shocked to find a lifter snapped at the roller damaging the cam. Luckily it was only 1 camshaft lobe that was damaged. My truck is running strong now after I repaired it
Any update after repairing it after 1 year ? Just want to know if it’s worth the fix
@@manofgod5501still works great. No problems
Si esa es la falla. Árbol de levas cilindro 5
Remembering the timing chain tensioner videos ... I hope all goes well in the troubleshooting.
I have an update. Video tonight.
Thank you good job
You better get a move on the cold weather is coming quickly sadly!!!! See you in the next video Dave!!!!
Yes, I'll be wearing trousers tomorrow. Can't complain, it was an excellent summer.
Not that this may be the same but had a similar issue with my F150 5.4 cylinder 7 would work great for a while then start with the missing and throwing cylinder specific as well as multi cylinder misfire codes. Replace the coil and would go away. Tried pretty much everything that you have done with the exception of the injectors. I also had cam phaser issues that were addressed by blocking the phasers and reprogramming the ecm. Finally had a spark plug break off in cylinder 7 while replacing the plugs that required the head to be removed to get it out. Engine had 305k on it so found a rebuilt and had it installed. Original injectors and coils were used and no codes have shown up in the 15k that i have put on since the rebuild so thinking that the issue, unfortunately, was cam lifter related. Suggest look for a 5.7 from a wrecker, Kijiji or some other equivalent with way lower miles which you should be able to get for a very reasonable price as there are many out there, change out the engine then sell. Would be a cost but looks like there will be a cost anyway just thought this might be the easier way to go. As for the cab rust not sure about Ontario but needs a safety and body integrity is part of the safety to be able to be registered by new owner so that could be an issue for you as well to consider. Not a good situation and very discouraging!!!!!
Just a thought Dave but have you tested the knock sensor, I bad one may cause the codes, worth a look I think, and what ever it is seems to be affected by heat.
Hi, i like the scissor tool you used at the 4:30 mark to remove the supply line - whats it called, and where can i find one? Thanks!
Scott , a bad cam doesn’t start skipping after it warms , if a cam lobe is bad it’s bad cold or hot and skips when you start each time , it’s metal and when it’s lobes are worn down doesn’t get better clearing codes . Your engine runs fine no skips while sitting then when you bring the rpm’s up it throws a code it can only be a couple of things fuel or electrical issues .
Have you checked the fuel pressure before and once the engine computer throws a code .
Your multiple misfires I think are fuel or electric . Can your diagnostic scanner run a injector test ( not injectors I think ) and can it run a fuel trim test and if so see if it drops off when the skip starts . Happy hunting and don’t pull that cam and I sure the valves are moving just fine . It’s frustrating to see you work so hard ar this struggle .
Disclaimer , I don’t work as a mechanic I just work on my own equipment for my business and my hot rods and my statements are just speculation .
Life was a lot easier when one wire started your engine and the same wire shut it off and there wasn’t three miles of wire under the hood just to make it start .
I don't think the cam is causing the bad running. The knock sensor is detecting the misfire and throwing it into limp home mode. I think if the computer wasn't such a smart arse then I could keep driving this for another 100K before I'd really notice a fault, lol. Hmmmm, error code delete? lol
My exact thoughts can't clear a code on failed mechanical part. Then have it work by clearing code.
Sadly I have the same issue. But I love watching your videos thank you!
Going through p0303 right now. Just changed my plugs. No help. Checking coil pack tomorrow and injectors. Your video was well done in showing me what I'm getting into and how to do it. I'll be referring back to it tomorrow. Thank you.
Hey brother going through the same problem but didn’t change the fuel injectors
Any update ??
Hello ?
I did plugs, coil packs, swapped injectors… nothing. Used Blue driver Obd reader live setting to examine O2 sensors… 1 of the 4 sensors showed no reading so I’ve ordered a sensor and will replace. Fingers crossed.
For some reason I never saw this. Sorry. Nothing yet. Currently truck is at the dealership and they're trying to do a number on me.
Every should have a automotive stethoscope. Besides being the best way to diagnose internal engine issues it is so therapeutic to listen to my 5.7😅
Maybe I just got lucky but I'm now at 180,000 km without the infamous HEMI TICK TICK TICK CAM & FAILURE. I can tell you that I have used high-quality 5w20 synthetic engine engine oil and increased oil change intervals to every 5000 miles or 8000 km. Time will tell, but I also have not allowed my engine to excessively idle as the majority of the cam and lifter failures where the engine was allowed to idle excessively such as vehicles, service vehicles, police, taxi, cab, delivery services, Ambulances, colder weather, environments up north, etc. Maybe I'm just getting lucky but I'm definitely keeping an ear on it lol.
On Alfa Romeo, if the accessory belt is stretched, can have a misfire. I don't know anything about Rams, though.
I have the same problem, with my truck I swapped the coils around and scanned it again but this time it said multiple misfires, so I cleared the codes and drove it for 20 minutes and it narrowed it down to one cylinder, starting it in the driveway doesn't always give you sufficient results
For me it turned out to be a bad PCM. There was no way to know other than swapping it out.
That really sucks Dave.
Just be careful with microfiber cloths in engine compartments - just a suggestion: use terri, it won't melt on hot surfaces.
Once you get a P0300 code, such as you just did in the video that simply tells you that there is more than one cylinder misfiring in which Usually points to cam and lifter failure. That is assuming everything else on your vehicle is in perfect running condition from the exhaust from the intake, side, engine oil, coolant, air filter, fuel injector cleaner. I'm sure you've already used. no restrictions in the exhaust manifold etc. if everything else is checking out to have no problems and in healthy working order? Then unfortunately you will likely need a cam and lifter kit handsome really good high-quality synthetic oil afterwards. Once that's done to prevent it from happening again a good counter measure would be a high flow oil pump. It's the oil pump that's on the big brother to the 5.7 L which is the 6.4L HEMI 6.4 392 HEMI. It's a factory direct bolt on oil pump that the one in your current engine in order to get the proper oil pressure and not throw a fault code.
I'm just watching this video now, but I'm sure you've already figured out that you need a new cam and lifter kit to prepare your misfire on multiple cylinders at higher RPM is when it's most noticeable on these engines that's why at low RPM it didn't throw a code and at higher RPM The misfire becomes more pronounced based on the speed of the engine and the more frequent opportunity for misfires.
You could also perform a cylinder leak down test in order to determine if it is, in fact, the cam and lifter causing them misfire with the intake valves, not fully seating and the exhaust valves because of the worn lobe or lobes on the camshaft. if you don't have the leak down tester, which is the opposite have a compression tester which could also be your next test checking the compression of each cylinder or just two or three of them to get an average of above 100 psi at cold engine operating temperature. Ideally, you would like to see approximately 150 psi on a good healthy engine during the compression test. if you do choose to hold the throttlebody open during the test, it's best to make sure nothing will get sucked down the throttlebody into the intake manifold (Ask me how I know)? If you're able to rig the throttle body to stay open, using some type of steel rod, then it would stay open fully during the test because if you just put your foot down on the gas pedal that won't work like it used to in the old days because of the drive-by wire It'll just put it into a flooded fuel condition in order to purge the fuel system of access fuel. if you don't hold the flap open on the throttle body, that's OK too but just make sure the same test is done for each cylinder at the same temperature so it's best to do it all at once in order to get an accurate reading. Regardless of which route you choose of the throttle body it only matters what the average of all of the cylinders is? If you did a compression test of all eight cylinders and seven of them were 125 and one of them was 75. The average would be 125 and whichever cylinder has 75 psi is the culprit. Next test would be the leak down test in order to verify whether or not it's the intake and or exhaust valves not seating properly while keeping in mind, there will be some acceptable amount of lead down psi through the piston rings into the crank case just like a normal combustion process of up to approximately 11% of the initial reading during the leak down test is acceptable. Again a healthy 5.7L V-8 HEMI ENGINE consistently averages 150 psi per cylinder on a healthy fully functioning engine. no less than 100 psi on any given cylinder is considered acceptable. Anything less than 100 psi is in need of repair. You can look at the valves going up and down, but it won't tell you the true health of a cylinder within an engine unless you perform the pressure tests. Hope this helps.
Leak down test won't show a worn cam lobe.
This same thing happend to me, I’m still trying to figure it out, P0305 replaced all spark plugs had no difference, swapped coils and it didn’t follow. put in a new injector and ended up with more cylinders misfiring on top of cyl 5, guess I’m gonna taking the intake and valve cover off to get a better look tomorrow
What was it ?
Did you get it fixed yet?
I used to have a 83 tbitrd that would cut off and die when I turned the corner too hard. I tested the wires and it was the fault. If all else fails check them for a ground. I think they used candy coating on these wires instead of insulation.
I have same issue but mine burn coils injector fuse also.
Hey brother I have a 2013 Dodge Ram 1500 express and have the same issue but mine is cylinder 6 what did you figure out
Turned out to be a bad pcm. No way of knowing, I just took a chance and swapped it for another one.
Dealing with this now on cylinder 3 on my Ram 5.7 hemi . Changed plugs , swapped coils etc still misfiring, My fear is lifter / Camshaft and the only way to know is to remove the valve cover. And watch the valve springs ! Of course it's the drivers side so I just do not want to do it ! It's the only way to know for sure if it's a lifter issue , the compression test doesn't tell anything. You have to look . I don't have 3 or 4 K to fix it if it is , Not sure what to do ....
Having problems with my truck same thing I just replaced coils and spark plugs just need to switch the injector and that’s my last hope
If the cam or lifter were bad it would make noise! Still think it’s a wiring issue, injector or coil? Need to check the driver signal on each when it’s missing. Possibly the coil or injector driver in the computer shit the bed?
That sounds incredibly hard to diagnose, lol.
@@ScottRods what was it
@@randyu8688 pcm he said in another comment
Hang in there I know your pain. A compression tester would also be helpful to compare the health of cylinder 5 to the others.
I've kind of accepted my fate at this point. To be fair, 300K kilometers is pretty good.
@@ScottRods Agreed 300K is excellent. Just remember anything can be fixed. It will be interesting to see what lies below the rocker cover.
Yah could be a lifter and cam
I traded in my 2014 Ram due to the Hemi tick issue.
I’m going through the same thing with a Chrysler 2006 5.7 hemi I’ve already put $10,000 in this car and I still have the same problem and I took it to the dealership like an idiot. Now I’m repairing it myself I just put in a new computer also which helped but didn’t fix it.
Creo que es la falla del árbol de levas en cilindro 5.
My 2014 is doing this exact same thing it's just a p0300 and don't all the same replacements all but injectors and o2
And runs fine just hates to idle
Same what did you do?
Just running it still no idea what it is leaning towards throttle body with the idle air control in it is bad
Fellow Ram owner, going through the same. Why is always #5!? 😟
Fellow ram owner as well, I’m going through this right now :(
Same here..
Mine was #7
@@Chefnaeehat was the issue
Cylinder 5 the devil ‼️
Poor Scott… Ugh…. This is a shot in the dark from an old guy. Twice in my 75 years I have had high mileage cars go wonky and discovered the cat converter had clogged up and turned the engine into a big compressor. The symptoms were it would start, then after a few minutes/miles/feet would run horribly. This was before error codes and to test was simple, take the cat out of the system and drive around for a few minutes. Might be worth a try as it would likely confuse the computer trying to spy out a code.
Thanks Joe. I'll do the valve inspection first, and if the valves look like they are doing as they are supposed to, then I'll try the cat thing.
Sorry, that was supposed to read ‘spit out a code’ not ‘spy out’ , told you I was getting old… by the way, don’t get discouraged your trouble shooting logic is impeccable!
I have p306, changes the plugs, and coil...I guess its time for the injector :(
Cash and see if you got a vacuum leak
same year, same model, even the SAME damn color same cyclinder, Im swaping fuel injectors right now already did coil/plugs was your Cam lobe/broken lifter roller or something else?
Mine turned out to be a bad PCM (ECU) I got a used one from a junker and got it re-coded to my truck. Problem gone.
If there's one thing I'm certain of, I need a Scottish vehicle mechanic....❤😊I'd make shit break down just to take it to him and hear him go off on a Scottish rant about this and that😂😂😂
hahaha, you've not seen me rant yet.
Same issue right now on my 2013 ram Hemi. Cylinder 3 for me.
I think we are both doomed, lol.
@@ScottRods think so. I'm out in BC and looking at the cost of cam and lifters or a new engine right now
What was it ??
Bad pcm.
My truck currently has this issue and gave me that same code they found a broken spring they found a throttle body issue as well as bad spark plugs, All in all $1,600 job 😭😭😭😭.... It is a 2017 ram 2500 tradesman with the 8-ft bed. And only has 48,000 mi. I'm ready to sell her but I love her so much 😭😭😭😭
What happened? Cam replacement?
Bad pcm.
Cylinder #5 is on the passenger side. Not the left.. I am deal with that now. Thick it’s an injector.
Hate to disagree but cylinder 5 on a Hemi v8 is on the left side. Number 1 is front left, 2 is front right, 3 is left 4 is right 5 is left etc etc.
in my case, it turned out to be a bad pcm. Keep us updated on your progress.
Oh, I am glad you got it fixed. My truck is highly modified, supercharger, headwork, cam, lifter etc. I suspected the PCM being bad before because of all the random codes I would get from time to time. It’s a Diablo unlocked PCM. Mine is a bit more complex. I replaced coils and spark plugs this weekend hoping that was it. But it’s wasn’t. So now I am between PCM and injector. Spark plug from cylinder 5 sis look a bit starved so it could be from either one of the two being faulty.
@@nickwilliams1961 Are you using a scan tool?
Yes, I have a scan tool and a computer both are reading P0305 which is for misfire in cylinder fire.
5 is on driver's side
Could be the computer mine was running like that changed the ecm and bam works great code is gone
Hey, you were right by the way.
How was it running bad what kind of symptoms? My 12 ram hemi has a cylinder 7 misfire and while driving the truck studders and shakes a little when accelerating and the rpms are between 2-3k
@@HomeGrownPyro1 Mine was doing that pretty bad at one point. Sometimes it would just cut out at traffic lights.
@@ScottRods thanks for the reply. I was just reading through the comments watching your video again trying to pin point the issue with my truck. Whst did a pcm run you in you don’t mind me asking?
@@HomeGrownPyro1 I got one on marketplace for $75 plus 60 to get it flashed at the dealer. Make sure you get the same type from the same generation.
I checked everything ,injectors lifters, spark plugs fuel pump,, in the end it was ecm ,, cost me 1200$
Where you getting a misfire ? And how did you find out it was the ecm
@@manofgod5501 cz mapping it twice and have same issue,,, after that i bought ecm as i said and the issue gone
MAP sensor
I bet you don’t