Mechanics

FUEL PRESSURE

Chevrolet Silverado

I have a 1999 Chevrolet Silverado 5.3 ltr engine with 112,000 miles. My fuel pressure gauge shows 59 lbs when the key is first turned on. After the pump shuts off after 1 1/2 - 2 seconds the fuel pressure drops to 0 immediately drops to 0. Is this normal or do I have a fuel leak somewhere. I have replaced the fuel filter, pump, heat sensor and fuel regulator.
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Johnanderson
September 25, 2007.



It shouldn't do that not that quick-

If pressure drops quickly like that and all that stuff you have changed the vehicle may have a leaky fuel line/one or more leaky fuel injectors.

Rasmataz
Sep 25, 2007.