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1992 Honda Civic RPM goes real low with AC on.

Tiny
JAUREQUI
  • MEMBER
  • 1992 HONDA CIVIC
  • 4 CYL
  • FWD
  • MANUAL
  • 154,500 MILES
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.
Friday, October 1st, 2010 AT 3:40 AM

8 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
What engine do you have?


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

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Friday, October 1st, 2010 AT 5:36 AM
Tiny
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  • 5 POSTS
Soory I forgot to add my car is Honda Civic VX. Engine is 1.5z litter vtec-e. Thanks.
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Friday, October 1st, 2010 AT 12:34 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
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://www.2carpros.com/forum/automotive_pictures/561653_Idle_up_valve_92_Civic_1.jpg

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Friday, October 1st, 2010 AT 12:38 PM
Tiny
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  • MEMBER
  • 5 POSTS
Ok I will & I'll let you know. I appreciate it.
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Friday, October 1st, 2010 AT 12:47 PM
Tiny
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  • 5 POSTS
I found that idle up screw with the diagram you sent me. Do I have to adjust te screw with ac on?
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Friday, October 1st, 2010 AT 2:17 PM
Tiny
WRENCHTECH
  • MECHANIC
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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.
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Friday, October 1st, 2010 AT 3:47 PM
Tiny
JAUREQUI
  • MEMBER
  • 5 POSTS
Ok. Is it called the fast idle valve? If so do I need to take out or how would I know it's damage?
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Friday, October 1st, 2010 AT 4:47 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Your really going to need some help. Your probably over your head on diagnosing this.
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Friday, October 1st, 2010 AT 5:10 PM

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