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1991 Ford F-150 Fuel Pump

Tiny
SPIDER28383
  • MEMBER
  • 1991 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 154,235 MILES
I have a 1991 ford F150 larait xlt with the 4.9L. When I switch it on the fuel pump comes on but it wont shut off. It's a duel fuel tank truck but the back tank is the only one that does this.
Sunday, March 8th, 2009 AT 11:45 PM

2 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Need to inspect relay. If relay is faulty it will stick causing pump to run at all times. If relay is OK, suspect faulty pump.

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Sunday, March 8th, 2009 AT 11:51 PM
Tiny
SPIDER28383
  • MEMBER
  • 1 POST
Thanks for the reply. I just replaced the pump in the front tank. And it literalry caught on fire. I guess the caseing on the pump was black and melted. Just tankful it didnt blow up. The pump was in a full tank of gas when it did this.
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Monday, March 9th, 2009 AT 12:01 AM

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