Audi 90 20V
AudiWorld Member
Joined: Mar 2010
Posts: 466
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Please describe in more detail what you mean by "has a little misfire..."
Is this a misfire at idle?
Is this a misfire when pulling away from a stop?
Is this a misfre while at freeway speeds?
The answers to these three questions will go a long way in allowing us to help you.
Is this a misfire at idle?
Is this a misfire when pulling away from a stop?
Is this a misfre while at freeway speeds?
The answers to these three questions will go a long way in allowing us to help you.
AudiWorld Member
Joined: Apr 2010
Posts: 113
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Could be an ignition issue. Could be a bad coil pack or ignition module. Also, the wiring harness that connects the ignition to the coil pack runs between the bottom of the intake manifold and the top of the block. If for some reason that harness is getting too hot, it could be causing an issue. That's just some really basic causes. It could be a lot of things, so any more info you can give would really help.
AudiWorld Member
Joined: Mar 2010
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You're running lean. When the car is cold, the fuel injection is enrichening the mixture, masking the problem. Same thing applies when you're warm, but stepping on the gas pedal, as the amount of fuel being shot dramatically increases. The problem is still there, but it's hidden.
99% of the time your issue is the result of a vacuum leak. My secret weapon to find vacuum leaks is a long butane trigger-activated grill lighter, set all the way down on low. With the car warm and idling, click the lighter to fire it up, then blow out the flame while still holding the trigger. With the end of the lighter, trace as many vacuum lines as you can, nearly touching them where possible.
Somewhere in there, a small amount of butane gas will get sucked in through a vacuum leak, causing your idle to rev a bit. There's your cracked vacuum line.
99% of the time your issue is the result of a vacuum leak. My secret weapon to find vacuum leaks is a long butane trigger-activated grill lighter, set all the way down on low. With the car warm and idling, click the lighter to fire it up, then blow out the flame while still holding the trigger. With the end of the lighter, trace as many vacuum lines as you can, nearly touching them where possible.
Somewhere in there, a small amount of butane gas will get sucked in through a vacuum leak, causing your idle to rev a bit. There's your cracked vacuum line.
Thread Starter
AudiWorld Newcomer
Joined: Dec 2011
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well... now ive got another problem on my hands.. i live in Wisconsin and its been super cold here and now my car wont start.. it turns over like the battery is dead yet i just bought a new one last night and charged it fully and it still doesnt seem to work.. idk im thinking either bad connection or maybe my starter is bad. but thanks and ill definitely try both of them things! thanks for the advice guys! much appreciated!
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