fuel pump pressure 1986 f150

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05-31-2014, 11:36 PM

Gene Beckstead

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fuel pump pressure 1986 f150

I have a 1986 F150 4x4 and would like to know what the pressure is a the fuel rail.This truck has two fuel pumps, one in the tank and the other on the frame

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06-01-2014, 06:43 AM

Franklin2

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38 psi at the engine with it running and good vacuum to the regulator. It will be a little higher if the vacuum hose is pulled off or the engine is not running. I believe the in tank fuel pumps run around 9 psi.

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