1973 K20 4x4 - Engine dies when AC turned on

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JZCracker

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Location
Idaho
First Name
John
Truck Year
1973
Truck Model
K20 FLEETSIDE
Engine Size
350
I'm no motor head but a quick learner. I had my local shop put in a rebuilt 350 with new intake, carb and redo the AC. Now once I'm driving around and come to a stop with the AC on, the car stalls. The only way to keep it running whiled stopped is to have my foot on the brake and give it a little throttle. Not sure if I need to adjust the idle or ??? Any ideas?
 

donnieray

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84,85,86.
Truck Model
86 C10, 84 K10 MM7 NP833 option truck, 85 K10.
Engine Size
350,355;350.
It should have a fast idle solenoid mounted on the carb to speed the idle up 300 rpm or so when ever the ac compressor is energized. I got one made by Edelbrock.
 

DoubleDingo

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1981
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81-C20 Silverado Camper Special-TH400-4.10s
Engine Size
Carb'ed Vortec 350
^This
 

SquareRoot

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85
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350
^^^^ Concur
 

bucket

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I agree that a kicker solenoid should take care of it, but there could be other contributing issues like poor carb tuning or a vacuum leak.
 

highdesertrange

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kalifornia
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mike
Truck Year
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Truck Model
k30
Engine Size
454
you absolutely need the high idle solenoid. is it on there and working? if it's there and working then like bucket said. highdesertranger
 

Craig 85

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Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205
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