Mechanics

FUEL PUMP WILL NOT SHUT OFF

1992 Ford F-150 • 4.9L 6 cylinder 2WD Manual • 232,000 miles

The fuel pump will not shut off when you turn the key to run. The relays click spastically and once in a while the pump will stop. When the pump does stop the truck will start and run for a moment. If it does not stop, the truck will not start. It cranks no problem. Battery charged, new fuel pump relay, same problem. This happens with both tanks. Please help!
Avatar
Ranger812572
August 25, 2014.




If the pump continues to run then this may be a pcm problem as it tells the relay when and when to not work. Since you have already replaced the relay and makes no difference the I would suspect the ecm more than anything. The only other thing I can think of is the fuelpump cutoff relay which I have included a pic.


Hmac300
Aug 25, 2014.
The ecm id number on My truck is F2TF-12A650-APB And at the parts house is $250. Are there any other computer ids That will safely (and more cost efficiently) interchange?


Tiny
Ranger812572
Aug 26, 2014.
No idea but I kind of doubt it they are engine/trans sppecific
AD


Hmac300
Aug 26, 2014.

AD