Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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What kind of problem are you having?
The lift pump will pump fuel back to the tank after the system is primed.
DO you have a scan tool that you can monitor fuel pressure?
What kind of scanner? It does not show fuel pressure?
you may in fact have a pressure relief valve problem. Seeing fuel pressure would help assure that is the problem
You have 1 relief valve. Yes it could be bad enough to keep from starting. Yes you can pinch off line and see if that helps. Do not leave clamped for long.
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