osus86diesel
Full Access Member
Does anyone know how much pressure the lift pump should be operating at on a 7.3?
Thanks
Thanks
Fuel pressure
- Thread starter osus86diesel
- Start date
GenLightening
Yeah, it's a CHEVY!
4-7psi for the stock lift pump and about 11psi max if running an electric pump.
hesutton
The Anti-Anderson
You could test the lift pump and see if it is up to *****. Take the core out of the schrader valve on the fuel filter head. Hook up a pressure guage to that valve and crank the engine. It should be 4-6 psi. For volume, you should get 1/3 of a pint minimum with 10 seconds of cranking.
If it is the fuel pump, you can just replace it with an electric pump. If you go with another mechanical be careful. Make sure that the cam is at low position, it is usually necessary to use a mirror and a remote starter switch. Observe the cam through the mounting port and bump the engine around until a one inch wide machine surface is observed. This is low position of the cam. If not installed correctely, it can damage the pump and possible the motor.
Heath
If it is the fuel pump, you can just replace it with an electric pump. If you go with another mechanical be careful. Make sure that the cam is at low position, it is usually necessary to use a mirror and a remote starter switch. Observe the cam through the mounting port and bump the engine around until a one inch wide machine surface is observed. This is low position of the cam. If not installed correctely, it can damage the pump and possible the motor.
Heath
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