??? Carburetor Issue ???

bdMember

My car has a Holley 750cfm double pumper carburetor (4150). It seemed to run well until recently when it started to cough and sputter when I try to accelerate. Cruising seems to be okay but I do hear a more prominent popping noise from the exhaust when I back off the accelerator also. It just started doing this the last two times I have driven it. I don’t get a chance to drive it very often, once every 3 ~ 4 weeks or so. I am wondering if something is sticking in the carburetor. Anybody have any idea as to what is going on or what to look for? Perhaps a problem with the accelerator pumps or power valve?

8/11/159:11 PM

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rockyMember

This sounds crazy - but this is what was happening to me when my distributor pin was beginning to shear, retarding the timing.

Something to check on.

You may remember the famous exchange...

... I found this tidbit of information, recorded in an exchange between George Holley and Henry Ford. This discussion was recorded during discussions in Detroit, Michigan, as George Holley was working with Henry Ford to integrate the “new-fangled” Holley Model NH carburetor in Ford’s then-new Model T horseless carriage.

(HF) “George – This carburetor is not adjusted correctly!”

(GH) “Henry – I am telling you for the last time: 90% of Carburetor Problems are Electrical!” (Ref 1)

Reference 1: Conversation between Henry Ford and George Holley, Ford Motor Company, Detroit Michigan, recorded by Thomas Edison, on an “Edison Cylinder Gramophone” on 12 February, 1908.

8/11/159:32 PM

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