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What will cause my car to, occasionally, idle high other times idle low and sometimes stall.

Tiny
HULICRO
  • MEMBER
  • 2004 CHEVROLET CAVALIER
  • 60,000 MILES
These problems mostly happens at stop lights and red lights, and in warm to hot weather, not as frequent in cooler weather. When it stalls it will start right up again(not fun in traffic). I have noticed the smell of gas under the hood at times, but do not see gas leaking anywhere. 2004 chevy cavalier 2.2l ecotech engine, manual trans., After market air intake.
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Monday, December 19th, 2011 AT 11:49 PM

4 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I would check for vacuum leaks and remove the idle air control valve and clean it and clean the port while the vale is off. Also any codes?
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Monday, December 19th, 2011 AT 11:52 PM
Tiny
HULICRO
  • MEMBER
  • 2 POSTS
No check engine has come on could a system check still produce codes?
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Tuesday, December 20th, 2011 AT 12:03 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Along with Saturntech9's advice, I would go a little further.
Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate.
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+1
Tuesday, December 20th, 2011 AT 12:30 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I agree with wrenchtech also yes you could have trouble codes in the computer even though the light isnt on.
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Tuesday, December 20th, 2011 AT 12:35 AM

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