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Not Another Misfire Thread....

trel

By trel,
in Engines & Forced Induction

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trel Mentor

trel

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So tonight after work I decided to clean my engine bay. All well and good, did it while car was running no problems.... I finish up start driving home and just briefly gave it a squirt and I got the dreaded miss... No worries I thought, it must be due to the engine clean I had just done.

I get about 3 streets away from my place and the misfire starts on low throttle, I pull up into my driveway and the car sounds as if it is running on 5 cylinders now...

I'll leave it overnight and see if there might have been some excess water that may have dropped into cylinders. Would anything else cause this though other than "your coilpacks are hammered" or "change your plugs"...

It must be related to the clean I just did, but if I have damaged anything in the process what should I be looking at?

Cheers.

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mad082 Grand Master

mad082

Posted
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it will more than likely be due to moisture as guilt-toy said. first look for any pools of water around the plugs. if there is use a compressor to blow the water out or tissues to mop it up if you don't have a compressor. do this before removing the plugs.

then take the plugs out and give them a wipe down with tissues, and do the same with the coils. stick it all back together and see how it goes

shaunvlc Enthusiast

shaunvlc

Posted
Posted

pull the coilpacks out. when i did my engine bay. i covered all the electrical components. still managed to get water into my coilpacks. on some cylinders the water completed covered the spark plugs. didnt take long to clear out and is also good as you can check that the coilpacks and plugs are in decent condition.

trel Mentor

trel

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Posted

Was planning on doing your suggestions tomm. Weird thing is though, I started it today no problem until car got warm and I opened throttle a bit.. Misfire again even on idle.. Looks like a trip to burson tomm. For plugs and can of compressed air.. Will let you know how it all goes. Thanks for the suggestions.

GUN32R Apprentice

GUN32R

Posted
Posted
Was planning on doing your suggestions tomm. Weird thing is though, I started it today no problem until car got warm and I opened throttle a bit.. Misfire again even on idle.. Looks like a trip to burson tomm. For plugs and can of compressed air.. Will let you know how it all goes. Thanks for the suggestions.

I had a misfire problem for the past month after installing a new ECU, cam gears and injectors (R32 GTR). We replaced ignitor, coils, plugs, ECU - checked fuel filter, fuel pump, earthings etc etc - remapped fuel also. After doing this (all on Dyno etc) we still couldnt resolve it.

IT ENDED UP BEING THE EXHAUST MANIFOLD GASKET!!!

If you get nowhere on the electrics try to listen out for a hissing noise around the exhaust manifold.

mad082 Grand Master

mad082

Posted
Posted
Was planning on doing your suggestions tomm. Weird thing is though, I started it today no problem until car got warm and I opened throttle a bit.. Misfire again even on idle.. Looks like a trip to burson tomm. For plugs and can of compressed air.. Will let you know how it all goes. Thanks for the suggestions.

this is due to the extra load once you get on the gas. very few missfires happen at low load

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