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Idle fluctuation problem

 
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Old 09-11-2011, 07:51 PM
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Idle fluctuation problem

Ok so I need some help. I just got a 1997 prelude base model h22 a4 with around 150 k runs great looks good but the idle fluctuates. It's the worst when the car is cold but acts up after a decent trip on the highway as well.when I start it up the idle flucuates from about 1500 to 2500 up and down and seams kind of random. Once warm it tends to stick at 2000 idling unless I hit the gas and then it stays at about 900. I've replaced the idle air control valve but didn't help. So maby vacuum leaks? It does look like the motors been out of the car. The ac has been taken out as well as the cruise control. Please help I'm stumped.
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Old 09-11-2011, 10:13 PM
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Re: Idle fluctuation problem


This has been covered many times.
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Old 09-11-2011, 10:35 PM
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Re: Idle fluctuation problem

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Old 09-12-2011, 07:54 AM
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Re: Idle fluctuation problem

Fast Idle Thermo Valve.
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Old 09-12-2011, 09:16 AM
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Re: Idle fluctuation problem

the FINAL idle problem thread!!!!!


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