I have a Ford f 150 4 wheel drive and it has.

Tiny
JAMESPATTON
  • 1988 FORD F-150
  • 130,000 MILES

I have a ford f 150 4 wheel drive and it has duel tanks when there full and go down to about half tank there fine but below that the gauge will start to fluctuates.

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Saturday, March 23rd, 2013 AT 6:00 PM

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Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

Sender unit issue.

Do both tank do this? If they do, check the connector at the switching valve for corrosion

Roy

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Saturday, March 23rd, 2013 AT 6:09 PM

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