Mechanics

ROUGH IDLE

Chrysler Concorde

I recently bought a 96 Chrysler Concorde with 118,000 miles. It has a 3.5 engine. Idle is very rough and acts as if the engine will die, but as of yet has not. I have checked codes both with the on board computer and at a shop. No codes showing. I am at a loss because the car drives well down the road, gas mileage is good, and there is no smoke.
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Steve Smith
January 20, 2007.



Indications are that the automatic transmission control unit has failed. Replace.

Bruce Hunt
Nov 14, 2006.
Try cleaning out the throttle body-check the EGR for carbon-also clean idle speed control or idle air control.

Rasmataz
Jan 21, 2007.
Could also be a clogged catalytic converter. Does your exhaust smell like rotten eggs?

Tiny
Stratus98
Jan 21, 2007.