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Discussion Starter · #1 · (Edited)
I have a 72 GMC Sprint w/ a 350, w/ a Holly 4 barrel. When I start it up, it idles fine. After a warm-up period, I put it into drive & it starts to spit & sputter when I hit that gas. I have to give it a lot of gas to start off. It is fine up to about 20 mph, then it wants to cut out. I have replaced the Fuel Filter, Fuel Pump, Starter, & have checked the jets on the Carb. Any help will be most appreciated.

 

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Is the carb new? Did you tune it to your app? I.e., squirter, pump cam, jets, power valve, mixture screws, etc? And if it's not new, has it been rebuilt recently? Stuff gets worn out, leaky and clogged. Every once in awhile, you just have to start over.
 
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