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Virtual Wrench
Virtual Wrench, Chevy Mechanic
Category: Chevy
Satisfied Customers: 14612
Experience:  35 years Master Mechanic
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2002 chevy: stall..runs rough..Idle, runs great at highway speeds

Resolved Question:

Having a problem with my 2002 chevy Prism wanting to stall when the engine is cold, and runs rough at an Idle, runs great at highway speeds. But misses badly at an Idle. what should i look for or test?
Submitted: 5 years ago.
Category: Chevy
Expert:  Virtual Wrench replied 5 years ago.



Is it doing this only when engine is cold?




Customer: replied 5 years ago.
No It misses when at an Idle or low rpm when warm also, but not as badly.
Expert:  Virtual Wrench replied 5 years ago.



Remove the Idle Air Control valve and clean all carbon deposits from it then put it back on. This will do the trick in most cases, but if not, replace it.




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