Subject	Rough Idle When Warm
Posted by	AddictedToBoost on October 16, 2014 at 10:58 AM
	This message has been viewed 948 times.
Message	1990 TT. The car runs great under load when warm or cold. The cold idle is great as well. But as soon as it warms up (goes closed loop???) it instantly starts to idle rough. The change is instantaneous as if one of the sensore used in closed loop operation is bad. The idle is rough and fluctuates a few hundred rpms with vacuum fluctuating as well. No codes. Any tips on where to look. I did a power balance test and the rough idle, while it sounds like a miss, is not localized to any cyclinder.
Follow Ups	Rough Idle When Warm - AddictedToBoost 10:58:33 10/16/14 Re: Rough Idle When Warm - AddictedToBoost 11:10:30 10/16/14 tested o2 sensors? (n/m) - LivinTheDream 15:21:48 10/16/14 Re: tested o2 sensors? - AddictedToBoost 00:15:43 10/17/14 engine temp/fuel temp sensors, vacuum leak - FrozTTy 08:14:44 10/17/14 Off the top of my head the O2's arent used at higher rpm - LivinTheDream 22:06:35 10/17/14
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