Engine missing at idle
 

I recently picked up a 2001 A4 1.8T. After the car warms up it tends to "missfire" while idling at a stoplight. Any ideas? I did a search of the forum but didn't find anything relevant.

RE: Engine missing at idle
 

Pull the codes. could be anything from a bad spark plug to a vacuum leak.

RE: Engine missing at idle
 

Could need a throttle body alignment.

RE: Engine missing at idle
 

...or throttle body cleaning...

RE: Engine missing at idle
 

if the check engine light on, then pull the code from autozone or advance auto parts. they will do it for free. while you are there get yourself a new set of plugs NGK BKR6E.

RE: Engine missing at idle
 

Even if the CEL is not on there will be codes stored.

RE: Engine missing at idle
 

does it miss worse as you go up in rpm

it cold be that your sai is bad (letting air into your exhuast when deacelerating)