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| Engineering/ Technical Ask technical questions about cars. Do you know how a car engine works? |
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#1
08-01-2003, 10:41 PM
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idle problem
I have a 94 grand prix with a 3.4 dohc v6. The problem I have is that when I come to a stop the rpm's jump from about 500 to about 1,500. I tried spraying starting fluid on the engine to see if I had any vacuum leaks but no change in idle. It runs fine while I'm driving but if I stop to long the idle bounces.
Pppppplllllllleeeeaaaassssse help!!!!!!!!!!!!!!! P.S. Already changed the ecu and the O2 sensor. 
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#2
08-01-2003, 11:56 PM
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u should check ur IAC(idle air control) motor. the motor maybe sticking. try tap on it with a hammer or something and c if the idle return to normal. somtime by tapping on it, it might free it up.
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#3
08-02-2003, 11:07 PM
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I tried to test it by removing it form the throttle housing. When I turned the car to the on postition it moved in and out, but when I turned the car off the plunger popped out of the IACV.
Any Ideas?
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