Low fuel pressure lean fuel code 171

[Mdonahue]

99 GTP miles 130000

runs rough most of time, code occurs just about everytime it is driven.

have replaced fuel pump, fuel filter, vaccum harness, fuel pressure regulator.

I have been thinking about getting an adjustable pressure regulator and just pump it up.


fuel pressure is at about 40 psi should be 55.


Possiblities -

other component on the vaccum harness leaking.