Honda/Acura Tech Honda tech discussion.

a/c = idle problem

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Old Aug 11, 2008 | 08:55 AM
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Default a/c = idle problem

its a 97 accord se. its a f22. the car idles fine, but whenever you turn on the a/c the car kinda chokes or studders and drops in rpm. then the car shakes really bad. i was told it may be the idle boost valve. but i dont know what that is or where it is. it would be helpful if someone had a pic or something.

thanks guys
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Old Aug 13, 2008 | 09:46 PM
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if its not the idle boost valve try letting mechanic check the a/c clutch..
more oftenly the honda's a/c compressor problem is its clutch...
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Old Aug 14, 2008 | 06:24 AM
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also check the motor mounts. i have found that when the motor mounts are bad it will cause this vibration when the motor drops in rpm. or also if someone has added motor mount inserts this will also cause this.
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Old Aug 14, 2008 | 08:28 AM
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motor mounts are fine, will look into ac/compressor.. im just wondering if anybody has this problem..?
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Old Aug 14, 2008 | 11:16 AM
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most likly its the compressor going bad....
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Old Aug 14, 2008 | 12:07 PM
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Could be a bad compressor.

There is a idle step up when the A/C is turned on, that works with the fuel injection. Not sure if it's a selinod or motor on the TB, but it's controled by the computer or relay.
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Old Aug 14, 2008 | 12:44 PM
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happened to my compressor clutch started going bad, and locking up, got to a point where the belt was grinding on it, even with ac off, i just cut the belt FTW!
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Old Aug 14, 2008 | 02:28 PM
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A/C works great.. so im not sure if compressor is going bad though?? if i rev my car at idle or when im driving with no stoping the car it runs smooth with cold a/c.. but if i dont rev the car when its at idle and the a/c is on it chokes/low rpm/car shakes.. ?? i donno.
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Old Aug 14, 2008 | 03:21 PM
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on my civic d16z6 when my idle air control valve went bad the car did this. i replaced it, cleaned out the throttle body as well and got it running correctly.
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Old Aug 14, 2008 | 04:30 PM
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it's the idle control valve buddy it happens alot to accords... if it's not that then u need a new throttle body sensor.. just the sensor.. i made an error in buying the whole throttle body lol
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