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2005 Buick Park Avenue Base 4dr Sedan *Ltd Avail*

2005 Buick Park Avenue
Trim Info:
Front Wheel Drive, 4 Door Sedan, Large Car
20 mpg city / 29 mpg hwy
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October 10, 2012, 2:07 pm

Dan K
 

Question: Rough Idle

The car idles rough. I put in fuel injector cleaner and that helped smooth it out, but when it is in gear in idle it is very rough, as soon as we accelerate it smooths out adn there is no lack in performance.


October 19, 2012, 8:38 pm

Ron W
Expert Mechanic

Your vehicle has an IAC (Idle Air Control ) valve. When it opens or closes it increases or decreases the amount of air it lets into the throttle body. By changing the air flow, it controls the idle speed. Sounds like yours may not be reacting correctly.


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