Why do engines misfire?
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- Tutorial - How to diagnose misfire on vauxhall astra 2008 petrol
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the specific cylinder in which the misfire has occurred. A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculation (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 4 misfire is P0304, P0300 code is for random cylinder misfire in the computer memory.
Remove the coil pack, remove the plugs for any sign of damage and replace all four plugs with new coil pack and that should fix the problem.
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Blows the debris into every other spark plug hole...
Hahahah
Regarding Opel's Turbo, when getting boost, and experience engine jitter/missfire, it may be tiny cracks in the rubber. If you've had such and only changed coil pack, be sure it will return later, as the outter side of the spark plugs most likely have black lines on it, caused by the missfire and have ionized that black line, making the spark to travel along the black line instead of making the spark inside the engine. The reason why this is related to boost is because the air/fuel mixture in the engine will be higher compressed, technically increasing the resistance between the gaps on the sparkplug, making the spark to jump 5 cm on the outside instead of the 1mm on the inside
Where's the rest of the video?
I would swear Opel cil nr. 1 is NOT at the distributionside
It is at the gearboxside
i got the story..
thanks
So all it needed was a new spark plug, right...
+Murtaza's Vlogs what was your car doing?
no no, im refering to your car
Murtaza's Vlogs lol ok Nah that car needed coil pack as well as plugs
Hi
I've changed my coil pack recently like 3 months ago now been month now been getting the P0301 EML comes up what could be the problem please help thanks my car has a gas conversion it runs on LPG
THANKS
check the coil pack, spark plugs and compression of the cylinder that misfires
Would you take your car here,he was blowing the crap everywhere and nearly forgot what the timing chain was called!!
good video by way, shame it wasn't longer
OMG, firstly, I can`t understand why you loosened the other spark plugs before using the air hose in and around cyclinder 4 = you blew the broken bits everywhere and into the other cylinders without any remorse, caution or common sense - or am I to believe this is how you normally treat customer vehicles to make more money by causing more damage?..............this is poor working practice.
Wow, and I was just about to fork out 300 on getting it done at a vauxhall garage
Those plugs were shot anyway. Amazing how many people dont service their cars fully.
My Astra was diagnosed as having a manifold swirl valve malfunction, now it has jerky acceleration when I put my foot to the floor. Can you advise?
That was a good video my friend very informative learnt a lot from that
Hi
Where abouts in Uk are you if I wanted to come get my car checked from you thanks
We’re based in southampton
I'm getting a 130000 code on my astra P1300 - Misfire Detected at Low Fuel Level do you no what this could be ? Thanks
Good video straight to the point and very well explained thanks!
Thank you 🙏
Hi
This is the code i got
Engine control - 15A / Simtec 75P0170 - Fuel correction (bank 1). Error Message : Malfunction.P0301 - Cylinder 1. Error Message : Misfire detected.P0597 - Coolant circuit thermostat. Error Message : Voltage out of range.P0011 - Camshaft timing (bank 1), intake. Error Message : Malfunction.P0302 - Cylinder 2. Error Message : Misfire detected.P0303 - Cylinder 3. Error Message : Misfire detected
Ive replaced the spark plugs and new coil pack but still keep on getting the engine managment light come on one day then its off again on its own then one day comes on then two days goes off and comes on again, what could be the problem??
My car is ASTRA 2009 AUTOMATIC ITS GOT LPG CONVERSION ON IT AS WELL THANKS IN ADVANCE
Any ideas taj cars???
the way your camera keeps moving is making me dizzy lol. but nice video.
+Oliver Joseph my apology but I'm working on that and thanks for letting us know :)
Taj Tyres ltd haha thats ok. i just checked your profile your missions from me!! .. ive got some errors on my astra 003400 and 111261. wondering if you ever come accross these. camshaft position sensor wasnt plugged in but is now.. error still there. :( ... vid on my channel.
+Oliver Joseph I'll check it out tomorrow and will ask my mechanic see what he thinks 👍
+Oliver Joseph just spoke to my mechanic he said if you could get it diagnosed and message me the codes and we will then check it on our system to see what can be done!
Taj Tyres ltd hey .. error ecn 003400 is that the same as P3400?
Need help my miss zafira 1.6 the coil pack is not sparking on no1 so i change it 4 a new 1 and the same so far i put on 4 coil packs on and still the same and i put in new spark plugs
Have you checked the injectors? You could have a faulty injector
Hi Chris,my car shudders when it's idle,and also shudders when driving,any ideas of what could be the cause,its a vauxhall corsa 14 plate.
Andrew m coil pack by the sounds of it. Mine done this, changed it and problem solved.
Fraser Donaldson sound mate,it was the coil,got it changed,back to running smoothly.cheers mate.👍
does the engine cut out OR THE VIDEO?
The video cut out! After replacing the plugs and changed the coil it was running really well.
Whats the best spark plugs to use for these astras please could you advise thanks
Usually we would only recommend what’s good for the car and recommended by Vauxhall but you have makes like Denso, Bosch and NGK
Taj Cars
I meant to say was which one should i use only from vauxhall?? Please could you advise and also the one im using now are ngk thanks
Sundus Shazadi 3 types for this model
NGK ZFR5F ROUGHLY £6 each
Bosch FQR8LEU2 ROUGHLY £5 each
Denso K16TT ROUGHLY £5 each
NGK is usually pretty good so I would stick with them.
Thanks
Is this a common fault with Vauxhall’s ?
Yes it is on most of the astra’s and I did one yesterday but it wasn’t the coil pack or plugs so i ended up with replacing 1 injector and that fixed the problem
Taj Cars how did you find the injector was at fault?
what size of screws did you use?
+Eric Ogunsede T27 Torques for the screws and 16m deep socket for the plugs! Hope this information helps :)
I had a new coil pack fitted less than 6 months ago (well I think I did) in a astra 1.8 57 plate, and I read cylinder 2 is misfiring could it be the sparkplugs then?
I thought coil packs were sparkplugs, didn't realise the engine contained both
hi thanks for the compliment! vauxhall has this common fault with coil packs and if you've had yours replaced not long ago then it should be under warranty. and if you've detected misfire then i would advise to replace coil pack as well as plugs and that shoud fix the misfire. hope this information is helpful :)
I have that issue with a 2005 Astra H 2.0 Sri. replaced coil and spark plugs from vauxhall dealer and still a misfire. About to get shot of it as at my whits end. I did a pedal test - got quite a bit
0204 / 1120 / 0300 / 0304 / 1614 / 1616 / 0000
I just aint got a clue what to do......
P0204 Cylinder 4 Injector Circuit Low B-034
P1120 Accelerator Pedal Position Sensor 1 High Input C-008
P0300 Random/Multiple Cylinder Misfire Detected B-024
P0304 Cylinder 4 Misfire Detected B-024
P1614 Wrong Transponder Key Immobiliser B-006
P1614 Immobiliser Wrong Signal Received Immobiliser B-008
P1616 CIM (Steering Column Module) Wrong Environment Identifier Immobiliser B-006
Most likely a bad injector. Whats your fuel pressure?
The pedal position shouldn't be an issue if you feel it's not an issue, but it's just a module like the rest of the car :)
Have you also swapped out the keys somehow?
no the pedal is not an issue but what is an issue is the squirreling noise coming form the engine and the severe misfire when it heats up. Would an injector react differently when hot from cold? My issue appears to be heat related as i can drive it every day until it heats up then it starts to misfire especially under load ie up a hill or steep angle. Oh further note when i hear that noise and put my clutch in the noise stops immediately. I could record it but i think the car may be scrap / project / spares - i dunno. MOTs up end of the month and I buy another car tomorrow. And always used same key i have a spare ive never used.
Hi again James,
An injector is basically a coil to create a magnet field that will draw a pin from a hole. Around the pin is pressurized fuel so when the injector is activated, it will pull the pin, letting fuel go out. When copper heats up, the resistance increases, so if the coil have gone bad (but still connected) and the resistance increases, it might not create big enough magnetic field to withdraw the pin to let the fuel go out, causing the missfire. Or it could be the other way around, coil is damaged and does not tighten the hole when the coil expands due to heat.
It's a wild guess from my side though. I'd try to swap the fuel injector on cylinder 4 with one of the other and see if the missfire follows the injector or the rest of the cylinder.
When you clutch, do you also release throttle? If you do, there will be no firing happening in the engine, hence the sound stops.