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Got the new banjo bolt with snubber and schrader valve installed. I used a fuel pressure gauge set from Harbor Freight. Its meant for gasoline vehicles so it may not survive long but it only cost $16. Anyway the pressure at idle is 22.5 psi and at 1800rpm it is 30psi. So I think this is correct...

Ill have the pressure gauge set up next week and see what I'm getting.

Ordered a Torks banjo bolt with built in snubber and a schrader valve from dieselORings.com. Plan to get a tester that will plug into the schrader valve. I already installed an adjustable return fuel check valve from Torks but since it was set at 25psi for a P7100 pump not sure what pressure it...

Thanks for all the great info. I did the test with the oil filler cap and there really is no blow by. So ill keep looking for a leak in the fuel supply.

I Put a new lift pump on it and a new return fuel check valve but have not checked the fuel pressure. Is the best way to check it to install a T in the fuel line for a pressure gauge?

Anybody done a compression test on Cummins 6cta8.3? Ive got a dump truck that is hard to start and puts out tons of white smoke while cranking. I thought it was just losing prime but thats not it. The smoke does not smell sweet. Its a bit acrid and diesel smelling. When the truck finally...