Idle goes up and down?
Idle goes up and down?
For some reason my idle goes is not stable going up and down from 1000-1500rpms. But then if I hit my rear defrost button, the rpms settle back around 900-1000rpms and I turn the defrost button off and idle is fine. wtf?
Originally Posted by HardHitter
Yea I did it twice
Originally Posted by clayne
Tom93,
Reconnect the ISC.
Close bleed screw under elbow leaving only about a 1/4 turn.
Dial out throttle linkage screw on top to have no pre-load on the linkage at all.
Reset PFC.
Do the 30 minute calibration.
10 minutes normal.
10 minutes A/C on.
10 minutes defrost on.
I have personally seen a PFC emulate a vacuum leak type situation around idle because I had not done the initial idle calibration after doing extensive changes to the car.
Reconnect the ISC.
Close bleed screw under elbow leaving only about a 1/4 turn.
Dial out throttle linkage screw on top to have no pre-load on the linkage at all.
Reset PFC.
Do the 30 minute calibration.
10 minutes normal.
10 minutes A/C on.
10 minutes defrost on.
I have personally seen a PFC emulate a vacuum leak type situation around idle because I had not done the initial idle calibration after doing extensive changes to the car.
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From: Metairie, LA near new orleans
AKA: BAC, IAC, etc Idle air control valve...This is the piece that has a black round bottom aluminum upper, held with 2 nuts and has a white plug connected to it.
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1st Generation Specific (1979-1985)
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