Bad fuel pump?
Thread Starter
Heel & Toe
Joined: Oct 2019
Posts: 18
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Bad fuel pump?
I have a small block 1970 corvette, ran fine a couple of days ago. After installing a new battery, tried starting, hard to start and will not stay running. After hard pumps on the gas petal, runs for a little while then dies or hard pumps on the gas petal and it floods. Goes this sound like a bad fuel pump?
James
James
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
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Cruise-In VIII Veteran
No, remove airfilter cover, have someone pump the pedal and look into carb. Does it spray fuel out the accelerator pump jets?
Have you tested the fuel pump for delivery rate?
Have you tested the fuel pump for delivery rate?
Race Director
Joined: Nov 2006
Posts: 13,227
Likes: 7,825
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Not clear on what diagnostic procedure was used to come to the conclusion that an engine that floods has a bad fuel pump.
What diagnostic tests have been done so far?
All we really know is your car doesn't want to start and run.
What do you know about the condition of the spark plugs and wires? Is the carburetor set-up and adjusted correctly?
And on it goes.
What diagnostic tests have been done so far?
All we really know is your car doesn't want to start and run.
What do you know about the condition of the spark plugs and wires? Is the carburetor set-up and adjusted correctly?
And on it goes.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
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From: Cool Northern Michigan
Backtrack your procedures. Diagnostic evaluation is easiest if you recall what was exactly done from point "A" to point "C".
Point A, ran fine.
Point B changed batt. Is that all? Cleaned cables etc? Nothing else?
Point "C' starts, barely runs.
Something you did is missing.
Point A, ran fine.
Point B changed batt. Is that all? Cleaned cables etc? Nothing else?
Point "C' starts, barely runs.
Something you did is missing.
