58 Rebuilt Fuel Pump - No Gas

[Eric S.]

Hi NCRS Members,

With fresh rebuilt 2x4 put gas down carbs to dry start, ran about 4-seconds. Did this at least 4-times. Disconnected fuel lines to remove fresh rebuilt, number matching fuel pump rebuilt by big name Corvette supplier. Gas line was bone dry. Put back old Holley mechanical fuel pump pushing 7.5 pounds. Put gas down carbs; car quickly started to run on old fuel pump.

Why did the fuel pump not work. I did remove screws and change clocking for proper in and out fuel line connection location. Maybe stock fuel pump has a fraction shorter arm that doesn't touch the rod, as compared to the Holley?

Aloha,
Eric

[Donald H.]

Re: 58 Rebuilt Fuel Pump - No Gas

Eric,

I would suggest taking the bottom back off the pump and just make sure that the diaphragm shaft did not become disconnected from the actuator lever when you re-clocked it. You can just pull on the diaphragm and see if it is still connected. The other think is check to make sure they oriented the valves correctly. Attached is a good picture of the valve orientation that I 'borrowed' from a set of rebuild instruction that Dave Zuberer published on the forum some time back.

Don