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Old 06-23-2015, 07:15 PM   #28
Old Henry
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Join Date: Oct 2010
Location: Orem, Utah
Posts: 5,781
Default Re: Bad fuel pump? 51 Custom

OK. So, in response to all suggestions, here's what I've tried and the results:

1. Ran with the gas cap off just in case the non-vented cap was the problem. Still died.

2. Wrapped the fuel pump, hose, and tubing going to it in a wet towel in case it was vapor lock. Still died.

3. Took the hose from the gas tank fuel line to the pump off and checked it for leaks. No leaks.

4. Took the settling bowl off and checked the gasket. It was neoprene like new. Put it back on and tightened the bowl good.

5. Blew through the gas line from the engine compartment to the gas tank 'till I could hear high volume of bubbles just in case it was blocked.

6. Tested the fuel pump for pressure and flow. It had over 4 lbs of pressure and plenty of flow.

Still, after driving it for a just a couple of miles the gas quit pumping to the carburetor. As it was dying before it totally did I got out with it idling and looked under the hood. There was some air coming into the settling bowl and it would still idle. But, any effort to increase the engine speed it starved for gas and died. It was like a plugged fuel filter allowing very slight flow but nothing more. I could start the engine drizzling gas into the carburetor but it wouldn't pump in.

Anything else to try or is it time to spring $50 to replace the fuel pump that tested OK?

(My wife is really really tired of towing this car home.)
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