Hey all,</P>


My engine has begun to startidleing roughwhen the car is stopped. This appears to happen more frequently when The Air Conditioning is on. the car has not stalled yet, it just idle's really rough until I turn the AC off. My warrenty just ran out so I have to take it in, I was just hoping to get some insight before I go in so I don't get taken to the cleaners.</P>


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Thanks in advance!</P>


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Cory</P>

 

first thing - how old are your plugs? Fouled or old plugs will lessen your spark, thus giving bad idle.

what kind of car is it? engine type? if its a 1.8t then make sure all your turbo hoses are connected and are not cracked/broken.
<edited><editID>brrman</editID><editDate>38054.6936574074</editDate></edited>

 

Not sure it's related, but has your engine been updated with the replacement coils (subject of a "customer service action" by Audi........to replace all cylinder ignition coils whether they've failed or not.......a problem that resulted in "rough" engine performance and/or stalling).

 

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This is a good thing to check - Audi just started replacing them ALL whether you've had a problem or not. Did mine. And its free... and its something you won't have to do in another 20, 30, 50k miles. </P>


Good luck...

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hey I want new coils for free thats only the non-AEB(newer) coils right!

 

I was having a similar problem and took it in to the shop and they cleaned out my throotle body because there was some build up in there in after that my car seemed to run well.

 

When a coil goes bad, you don't get rough idling; you get only three cylinders firing and that's NOT the same. You'll know when a coil goes out. The car bucks and jerks and you lose significant power, not to mention the CEL coming on.</P>


Your problem does sound like a dirty throttle body.</P>

 

I have a Audi A4 01 the 1.8 and for some reason when i try to drive it the car just jerks and i changed the ignition coils and spark plugs and now it only stops running and jerks after 5000 rpms but i need to find out what it is.... i know its a random miss fire but if any of you know exactly what can be causing this help please!!

 

mine was acting sort of like that, ended up with a vacuum leak and the turbo inlet pipe was off at the turbo.

 

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