Dies at idle when AC turned on and in gear??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sick472 · 05-24-2021, 11:29 AM

85 K20, 350, auto transmission, with a Holley carb....

The truck has gotten to where it may die at a stop if the AC is on (especially prior to warming all the way up). I can compensate for this by bumping the idle screw up, but then it kicks pretty hard when put from park into forward or reverse. So, I have set the idle speed to eliminate the kicking, but cannot run the AC without the threat of it dying at a stop.

Normally, the warmed up truck will start fine without touching the pedal, but if it dies at a stop, I may have to feather the pedal to get it to start. It definitely helps to turn the AC off when trying to restart.

Where should I start trouble-shooting this problem?

05-24-2021, 11:29 AM	#1
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,131	Dies at idle when AC turned on and in gear??? 85 K20, 350, auto transmission, with a Holley carb.... The truck has gotten to where it may die at a stop if the AC is on (especially prior to warming all the way up). I can compensate for this by bumping the idle screw up, but then it kicks pretty hard when put from park into forward or reverse. So, I have set the idle speed to eliminate the kicking, but cannot run the AC without the threat of it dying at a stop. Normally, the warmed up truck will start fine without touching the pedal, but if it dies at a stop, I may have to feather the pedal to get it to start. It definitely helps to turn the AC off when trying to restart. Where should I start trouble-shooting this problem? __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20

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