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Fuel Pump Check Valve and Pressure

Michael DeShazo
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Michael DeShazo New Member

Michael DeShazo

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Do 1996 Chevrolet C1500 5.7 Liter Engines have a Check Valve in the Fuel Pump to keep it from losing pressure at shutdown? Also, truck runs at 46 lbs pressure and will build to 50 pounds ONLY when cranking.   Is fuel pump weak or bad if pressure is not maintained upon shutdown and if pressure does not maintain at 50 lbs when running? 

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