1992 Honda Civic rpm goes real low with ac on.

154,500 MILES • 4 CYL • FWD • MANUAL
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JAUREQUI
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sometimes my car stalls when I let go of the gas pedal, but only happens with the ac on. when ac is off i dont have that problem thanks in advance.
Sep 30, 2010 at 8:40 PM
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WRENCHTECH
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What engine do you have?


https://images.2carpros.com/forum/automotive_pictures/561653_Engine_options_92_civiv_1.jpg

Sep 30, 2010 at 10:36 PM
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JAUREQUI
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soory i forgot to add my car is Honda Civic VX. engine is 1.5z litter vtec-e. thanks.
Oct 1, 2010 at 5:34 AM
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WRENCHTECH
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There is an "idle up" valve mounted below the throttle body that is designed to overcome the extra load of the A/C. Check it and see if there is anything obviously wrong with it.


https://images.2carpros.com/forum/automotive_pictures/561653_Idle_up_valve_92_Civic_1.jpg

Oct 1, 2010 at 5:38 AM
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JAUREQUI
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ok I will & I'll let you know. I appreciate it.
Oct 1, 2010 at 5:47 AM
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JAUREQUI
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I found that idle up screw with the diagram you sent me. do I have to adjust te screw with ac on?
Oct 1, 2010 at 7:17 AM
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WRENCHTECH
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No, I didn't say to adjust anything. The is a valve mounted below that to bring the idle up when the A/C comes on and it likely has a problem.
Oct 1, 2010 at 8:47 AM
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JAUREQUI
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ok. is it called the fast idle valve? if so do I need to take out or how would I know it's damage?
Oct 1, 2010 at 9:47 AM
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WRENCHTECH
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Your really going to need some help. Your probably over your head on diagnosing this.
Oct 1, 2010 at 10:10 AM
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