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| Cavalier Problem Diagnosis Got a problem you can't fix? We can help. |
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#1
04-17-2009, 10:11 PM
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stalling / surging idle
Last evening, I was driving my 97 Cav across a parking lot at very light part throttle. Lately, when driving at very light part throttle, the engine will slowly lose RPM's and stall or become very sluggish. When I stopped the car, the engine started surging wildly between 500 - 1200 RPM's. I was waiting for it to either smooth out or die. It just kept surging for about 15 seconds before I revved the motor. I held it at 3,000 RPM before backing off the throttle. It then took probably 10 seconds to slowly return to 600 RPM idle. Afterward, I looked for a check engine light - none! How can a car run so rotten and not throw any codes? Apparently, the computer thinks all is well.
I'm puzzled? Any thoughts will be appreciated. Thanks, 
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#2
04-19-2009, 03:21 AM
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Re: stalling / surging idle
Clean the throttle body, and remove the IAC motor and clean it and the passage it goes into.
__________________
'04 Cavalier coupe M/T 2.2 Ecotec Supercharged 14 PSI boost, charge air cooler, 42# injectors Tuned with HP Tuners Poly engine/trans/control arm bushings Self built and self programmed progressive methanol injection system
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