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IAC Valve Question



 
 
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Old January 10th 05, 11:12 PM
Nick
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Default IAC Valve Question

Hello all,

To my previous posting on a rough idle on my 95 Integra LS (90k).
I'm following the guidelines on adjusting the Idle Speed. The factory
manual suggests that with the IAC disconnected that the Idle speed
should be adjusted to 480 +- 50 Rpm. If I adjust it I can't get below
750 without closing the adjusting screw completely. I had adjusted the
screw about a 1/2 turn from the closed position, reset the battery and
started the car up and the RPMs showed about 500 and the car was
stuttering almost ready to shut off. When I adjusted it to a calm
level, and disconnected the IAC again, the RPMs showed close to 1k
RPMs. Some previous posted had suggested that I investigate the valve
timing but the factor manual doesn't suggest that I even look at that.
Could I have a malfunctioning IAC Valve even though the check engine
light is not on? I also heard a hissing sound so I may have a cracked
hose which is leaking air but I'll check that tomorrow. Although I
have done a lot of repairs to my car, this is new territory to me so
any help would be greatly appreciated.

Thanks,
Nick
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