Low Fuel Pressure

1996 CHEVROLET SILVERADO
250,000 MILES • V8 • 4WD
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CHRISR
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  • 5 POSTS
I am experiencing low fuel pressure. The pressure is about 52 psi with the key on and the engine not running. The pressure is around 50 psi. with the engine running. The spec calls for 60 - 65 psi. Also, the pressure holds when the truck is turned off.

I have changed the pressure regulator, the fuel filter and the fuel pump (Delphi - complete assy.)

What else could be contributing to the low pressure.
Feb 12, 2011 at 11:03 PM
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RASMATAZ
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  • 75,992 POSTS
The fuel delivery system may have low or no pressure due to a ruptured fuel pump pulsator The pulsator is the flexible connector between the fuel pump and the metal fuel line in the tank.
Feb 13, 2011 at 5:55 AM
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CHRISR
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  • 5 POSTS
This pump assembly doesn't connect to anything in the tank, it only has a pick-up with a strainer. Am I missing something??
Feb 13, 2011 at 4:16 PM
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