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My engine is a pontiac 400, carbureted, automatic transmission. It runs just fine all the time, but when I floor the pedal it cuts out. Anybody know what my problem could be?
 

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First thing to check is fuel delivery. Sounds like you are running out of fuel. Could be pump, lines, pickup in tank, or low float level. Run a fuel pressure and fuel volume check.
 

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Which carb do you have? If it's a Q-Jet, there are a couple of issues that can cause the symptom you describe...
Lars
 
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