1990 Ford F-150 fuel pumping from one tank to another

Tiny
MATTEMT
  • MEMBER
  • 1990 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 189,000 MILES
I have a truck with duel tanks when I am swithed to the rear tank it pumps into the front tank and overflows from the fill tube, I read there is a bad check valve, is this valve located in the line or do I have to replace the fuel pump in the front tank?
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Saturday, March 7th, 2009 AT 10:29 PM

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Tiny
(HELP)
  • MEMBER
The valve's in the pump but Fords "fix" was to "add" one in the line(I think). I've not done one myself but it's common - ask around 'till you find someone familiar with this - this forum should be a good place. There was a TSB at one time, I think. An older parts guy at the Ford dealer may help.
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Saturday, March 7th, 2009 AT 10:48 PM

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