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Why Does My Car Lose Fuel Pressure Overnight? [Solved]

Well, it could be leaking down from a number of places. There may be an injector that is not closing completely, the check valve in the fuel pump assembly could be bad, or the pressure regulator on the rail could be leaking- either to the fuel return line or the vacuum line.16 Oct 2008

Where Is The Fuel Pressure Going?

In this video Eric O. has a look at a Cadillac that will not hold

The #1 Cause of Fuel Pressure Problems

This video specifically addresses problems with aftermarket

Lag, Hard Start, Stall? Diagnose Car & Truck Low Fuel Pressure!

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