Choke Pull off Holly 4bbl Chevrolet Big block1965-1970 #3912092 or# CPA23
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If your car is hard to start, the pull-off is probably at fault.
Replace your pull-off now as the rubber diaphragm will fail someday
interchanges:
BWD AUTOMOTIVE VC314 Choke Pull Off
CARQUEST RED/FEDERAL PARTS CPA23
STANDARD INTERMOTOR WIRE CPA23
AIRTEX AUTOMOTIVE DIVISION 1C1073
AIRTEX ENG. MGMT. SYSTEMS 1C1073
AUTOZONE/AEM 1C1073
AUTOZONE/DURALAST-WELLS CP342
AUTOZONE/GP SORENSEN 7796233
BWD AUTOMOTIVE VC314
CARQUEST CPA23
CARQUEST RED/FEDERAL PARTS CPA23
CARQUEST/STANDARD MOTOR PRODS. CPA23
ECHLIN 24702
GP SORENSEN 7796233
KEMPARTS CP113
NAPA 24702
NAPA/ECHLIN FUEL SYSTEM-CRB 24702
NIEHOFF FS73
SIERRA MARINE CP342
WELLS CP342
OEM# 3912092 for Holley 4 bbl
Chevrolet 1965 - 1970: 327", 396" 400" 427" 454" H-4 4150,4160 - R-3043A, AAS, 3139A, 1A, 40A, 1A, 3245A, AAS, 46A, AAS, 67A, 68A, 3310A, 3416A, 17A, 18A, 19A, 20A, 21A, 25A, 28A, 3605A, 06A, 07A, 08A, 09A, 13A, 60A, 3806A, 07A, 10A, 11A, 14A, 15A, 36A, 37A, 39A, 3910A, 11A, 4053A, 54A, 55A, 56A, 4456A, 57A, 89A, 91A, 92A, 93A, 455A, 56A, 57A, 59A
GENERAL MOTORS OE 3868826
GENERAL MOTORS OE 3868864
GENERAL MOTORS OE 3869933
GENERAL MOTORS OE 3874898
GENERAL MOTORS OE 3875964
GENERAL MOTORS OE 3877413
GENERAL MOTORS OE 3881432
GENERAL MOTORS OE 3882835
GENERAL MOTORS OE 3883925
GENERAL MOTORS OE 3883962
GENERAL MOTORS OE 3884505
GENERAL MOTORS OE 3885067
GENERAL MOTORS OE 3886087
GENERAL MOTORS OE 3886088
GENERAL MOTORS OE 3886091
GENERAL MOTORS OE 3886101
GENERAL MOTORS OE 3890497
GENERAL MOTORS OE 3892338
GENERAL MOTORS OE 3892339
GENERAL MOTORS OE 3892341
GENERAL MOTORS OE 3893229
GENERAL MOTORS OE 3903389
GENERAL MOTORS OE 3903391
GENERAL MOTORS OE 3906633
GENERAL MOTORS OE 3906635
GENERAL MOTORS OE 3906637
GENERAL MOTORS OE 3908956
GENERAL MOTORS OE 3908957
GENERAL MOTORS OE 3908958
GENERAL MOTORS OE 3908959
GENERAL MOTORS OE 3912092
GENERAL MOTORS OE 3916143
GENERAL MOTORS OE 3916145
GENERAL MOTORS OE 3923289
GENERAL MOTORS OE 3925519
GENERAL MOTORS OE 3957859
GENERAL MOTORS OE 3959164
What does a choke pull off do?
When the engine is first started, a very rich air/fuel mixture is required because cold fuel does not turn into a gas. The choke at the top of the carburetor provides the richer mixture by closing thus creating an area of low pressure inside the throat of the carburetor which helps to pull additional fuel through the main metering circuit. At idle there isn't enough air flowing through the carb float to pull fuel through the main discharge nozzle. The manifold vacuum rather than normal venturi vacuum helps to draw the extra fuel through the main metering circuit by temporarily choking off the air supply. When the choked engine is cranked, fuel is pulled into the engine through the idle port, the transfer port and also the main metering circuit. Combined with the reduced air supply, it creates the very rich mixture that's needed to start a cold engine.As soon as the engine starts, it needs air to keep running and to offset the very rich fuel mixture. This is why the choke pull-off is important as it is attached to the choke linkage where it pulls the choke plate open slightly as soon as the engine starts. If the choke pull-off is defective because of a vacuum leak or ruptured diaphragm, the engine may be hard to start or stall.
You can adjust the choke pull-off by bending the "U-shaped" pull-off linkage. Do not bend too much as, it may open the choke too far, allowing too much air which will cause the engine to stall.
 
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Jacksons Auto Parts & MW Inc.
6220 Grand Ave
Duluth, MN 55807
M-F 8:30am to 5:00pm
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(888) 399-7278
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