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pulsing idle

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Old Oct 30, 2006 | 03:24 PM
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Default pulsing idle

when i start my car the rpm's raise then drop then raise then drop im pretty sure it's my IAC just wondering
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Old Oct 30, 2006 | 04:07 PM
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ur exactly correct.. thats ur problem
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Old Oct 30, 2006 | 05:02 PM
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to verify this take off the intake and plug the top hole in the throttle body if it stops then it's the iacv if not plug the bottom then it's the fast idle valve. and if both plugged and still doing it you have a leak somewhere else.
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Old Oct 30, 2006 | 05:31 PM
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Originally Posted by Apexi96
ur exactly correct.. thats ur problem
it really could be any vaccum leak
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Old Oct 30, 2006 | 05:38 PM
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Originally Posted by 94lsteg
it really could be any vaccum leak
that, or, ive had a TPS wear bad in one spot, and as its a standard potentiometer, the voltage will jump between the closest high and low spots.
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Old Oct 30, 2006 | 08:13 PM
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Originally Posted by skunk2racing97
that, or, ive had a TPS wear bad in one spot, and as its a standard potentiometer, the voltage will jump between the closest high and low spots.
+1.... if your car idles up then down up then down constantly, kinda like the car is breathing... its more likely to be your tps... your car wouldnt have a smooth constant idle if the IACV was bad.
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Old Oct 31, 2006 | 09:44 PM
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thanks all
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Old Nov 1, 2006 | 03:59 PM
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mine does that after i put my chip in my ecu
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Old Nov 8, 2006 | 08:47 PM
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i tryed everything i bought a new iacv and still does it i got a new throttle body and changed with new tps and map but it was used so i dont know if there sensiors where fucked to please help

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Last edited by Jdm-civic88; Nov 8, 2006 at 10:11 PM.
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Old Jan 16, 2007 | 07:52 AM
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take it to autozone and get a free check up
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