Mechanics

FUEL PRESSURE PROBLEM

1994 Jeep YJ • 4 cylinder 4WD Manual •

94 jeep wrangler 2.5 mpi. Keep loseing pressure. Tested pump. Putting out 39 psiif I clamp return line to tank got pressure run great pressure at around 90 psi as soon as I unclamp line bottoms out to 0 psi lustput pump in any thought signed FRUSTRATED
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Crowman
January 30, 2011.



That's indication of a bad regulator.

Wrenchtech
Jan 30, 2011.
Wich regulator just put 1 on the fuel rail still doing same thing

Tiny
Crowman
Jan 30, 2011.
That's the one that's supposed to be holding it back. If you have 90 when it dead headed and good volume and 0 using the regulator, you have a bad regulator. Make sure you don't have the lines reversed although I don't think that can be done.

Wrenchtech
Jan 30, 2011.