Fuel tank problem?

1994 FORD F-150
230,000 MILES • 4.9L • 6 CYL • 2WD • AUTOMATIC
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BRYPAT
  • MEMBER
  • 1 POST
My front fuel tank keeps getting full from the rear tank.I drive on the front tank and every time I fill the rear tank it transfers to the front. Help !!
Apr 16, 2026 at 8:37 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,415 POSTS
Yep, this is common when the tank switching valve goes bad, I replaced many of these back in the day. Replace the valve and this problem will go away.
Apr 17, 2026 at 7:31 AM
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