Power FC How does the PFC control idle?
#1
How does the PFC control idle?
I don't know anything about this, so please bear with me. There are three idle settings in the PFC (normal, electric, and a/c). When my lights are on or the a/c is on the car idles at the exact rpm that is set in the PFC. The "normal" idle, however, never idles at the setting in the PFC. It's always higher. Why would the PFC be able to control the electric and a/c settings so accurately, but not the normal setting?
Also, I've tried adusting the two idle screws and all that. The idle will hold to a good value (800-850) for a day or two then go back up to 950-1050. Thanks for any advice.
-Matt
Also, I've tried adusting the two idle screws and all that. The idle will hold to a good value (800-850) for a day or two then go back up to 950-1050. Thanks for any advice.
-Matt
#2
Eye In The Sky
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Usually that means the engine is getting too much air, but you said you tried adjusting both idle screws.
Try resetting the PFC; or turn O2 idle control off, adjust
the mixture for the middle or lean side of the range, then try idle with O2 off and on.
Maybe your ISC solenoid needs cleaning. If never done, it is sure to be very dirty and maybe sticking.
Try resetting the PFC; or turn O2 idle control off, adjust
the mixture for the middle or lean side of the range, then try idle with O2 off and on.
Maybe your ISC solenoid needs cleaning. If never done, it is sure to be very dirty and maybe sticking.
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