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Wayne
Wayne, RV Mechanic
Category: RV
Satisfied Customers: 8737
Experience:  Work on several type of Rv engine, Trans, brakes
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1982 chev p 30chassis 454 engine fuel pump stops delivering

Customer Question

1982 chev p 30chassis 454 engine fuel pump stops delivering fuel while driving has new mech. Pump and new poost pump and filters and hoses will restart after 30 min run fine for another 30 mi!es
Submitted: 1 year ago.
Category: RV
Expert:  Joe replied 1 year ago.
Hello, my name is Joe
If the fuel system has had an electric boost pump added by the coach builder or by an owner, then there should be an oil pressure switch that controls the electric fuel pump as a safety.
From your description, the oil pressure switch may be defective, or the engine oil pressure may be dropping too low as the engine heats up.
-Joe
Customer: replied 1 year ago.
I added the booster to try and solve the problem not yet fitted with switch
Expert:  Joe replied 1 year ago.
Thanks for the reply,
If it can be confirmed that both pumps are functioning and yet the carburetor float bowl runs empty, then I would suggest there is either a restriction, or there is a crack or opening in the fuel line between the tank and booster pump that is allowing air to be sucked into the fuel line.
I will leave the question up for the other experts to respond.
-Joe
Expert:  Wayne replied 1 year ago.
Hi I'm Wayne
I will try to help you with this
I see Joe has opt-out
remove your fuel cap, and see if it runs better
your vapor canister may be clogged
causing it to vapor lock
If this helped you, Please rate my answer
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Customer: replied 1 year ago.
Vented tank through overflow hose at filler no change
Expert:  Wayne replied 1 year ago.
Hi Thank you for that
but you need to remove gas cap, as I mentioned