Bad fuel pump cause lack of power ?

Asked by GuruBGN82 Feb 02, 2019 at 07:31 AM about the 2000 Ford F-150 XL 4WD Extended Cab LB

Question type: Maintenance & Repair

I have a 2000 F150 4.6
I have replaced spark plugs coil packs fuel
filter and driver side catalytic converter.
The truck still has a lack of power especially
after it gets into overdrive.
  I only have 25 pounds of fuel pressure I
realize it should be somewhere closer to 40
would this cause the lack of power and the
complete loss of power after overdrive?

1 Answer
43,820

Hornet_2497 answered 5 years ago

You are absolutely right. At 25 psi fuel pressure, the injector pulse is only spraying 65% of what the engine needs at any given throttle position. Check the fuel pressure regulator before replacing the pump. Also scan for codes. A faulty fuel regulator will sometimes set a code on Fords. My Taurus did.

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