How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Alex Armfield Your Own Question
Alex Armfield
Alex Armfield, ASE Certified Technician
Category: Ford
Satisfied Customers: 141
Experience:  over 8 years professional experience, ase master cert, epa 609
Type Your Ford Question Here...
Alex Armfield is online now
A new question is answered every 9 seconds

1997 F250: 7.3 Powerstroke..Fuel filter..light comes..flickers, knocks

This answer was rated:

1997 F250 7.3 Powerstroke, Fuel filter light comes on when accel. flickers, knocks out ccuise control,- then goes out after getting up to speed. Front tank only,if switched to rear tank, does not happen. I changed the filter on top of eng.   Is there another filter on the fuel lines ?? or something else ?



It sounds like you have a fuel pump going bad.

The pump is two stage. It pulls your fuel on the low pressure side, creating about 6 psi in the filter bowl, then back through the high side of the pump to the injectors at 45-60 psi.

The fuel bowl has a pressure sensor that is triggering your fuel filter light. The low pressure side of your pump is the problem b/c it can't keep up with the high side, causing you to lose pressure in the fuel bowl. If the high side of the pump goes first, you will lose power but the fuel filter light will not come on.

A replacement pump is about $90. It is a pain the first time to change but not terribly hard either.

Alex Armfield and 5 other Ford Specialists are ready to help you