car idle surges and stalls


Asked by May 28, 2010 at 10:10 PM about the 1993 Chevrolet Cavalier

Question type: Maintenance & Repair

I have a 93 Z24.  the idle goes from about 800 up to 1200 after the engine warms up.  then when driving, stalls when i come to a stop.  need help fast.  i was thinking IAC or TPS.  any other ideas???

3 Answers

sounds like your IAC-Idle Control Valve or TPS-throttle position scencor is bad,or it could have a vac leak.


It is your IAC... The up and down idle is the primary symptom of a bad IAC..... A Bad TPS would not let the car idle at all.


thanks mike. appreciate the help.

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