FUEL GAUGE

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May 13, 2011 | 06:30 PM

DBANDGB

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Cross-Country

Joined: Nov 2006

Posts: 94

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From: south carolina

FUEL GAUGE

89 F-150 WITH TWO TANKS. UP UNTIL two weeks ago the tanks & gauges worked correct. now when i turn on the back tank the gauge goes past full & i know it is only about a 1/4 full. any guess to the problem. thanks

May 13, 2011 | 07:41 PM

andym

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Joined: Mar 2002

Posts: 19,402

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From: Bonita Springs FL

Open (or shorted) circuit to real fuel tank float sensor.

May 13, 2011 | 08:51 PM

ostrx250

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Joined: Mar 2011

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or the float went bad and sank

May 13, 2011 | 09:30 PM

BIGskinny

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Joined: Feb 2011

Posts: 403

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I'm having the same problem in my rear tank. Pumps bad but before that it just pegged over full when switched over. So I pulled m buddy's new pump and sending unit out in the process of swapping as I type. If still off. Were would I check at? I'm lost on fuel systems