CEL: Random Misfire (Not coil packs)

**emblym** · 07-06-2008 04:54 PM

Hello everyone first post. I am a proud owner of a 2002 Black A4 3.0 V6. About two months ago I got a random misfire code on 2 cylinders.

My tech advised me to replace all 6 coil packs in which I did because I trust his word and me and my family have been doing business with him for years. Ever since the coil pack replacements the car has been driving great.

Anyways yesterday on a cold start the car started up badly and it gave me similar if not the exact same symptoms as before. The car idles rough for a but then after a minute it is good to drive.

I'm desperately trying to figure this out. All the research I have done on the internet has said that the coil packs were the problem. I've also read that a Camshaft Sensor could be the problem as well.

**dirtybrd** · 07-06-2008 05:11 PM

Find out if the 2 cyls are next to each other. You could have a headgasket issue starting.

**emblym** · 07-06-2008 05:58 PM

They are not. Thanks though.

**dirtybrd** · 07-06-2008 06:20 PM

Did you get a flashing or solid CEL? Did you notice any smoke when you started it?

**brewmastr** · 07-06-2008 06:31 PM

i think dirtybrd might be on the right track here, but honestly i hope not for your sake, if it just misfires briefly and then goes away on startup it could be worn valve seals leaking oil into the cylinders when the vehicle sits overnight, as soon as it burns off your all good again, i would check for smoking from the tail pipe at cold startup.