1992 Ford F-150 Gas Gauge

Tiny
DUSTMAN
  • MEMBER
  • 1992 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 157,000 MILES
My front tank gas gauge reads empty but engine runs fine. Switch to rear tank and gauge moves but engine stops. Switch back to front tank. Gauge goes to empty and engine runs fine.

Is this 2 problems and where/how do I start?
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Saturday, August 14th, 2010 AT 3:08 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
There are seperate float assemblies in each tank. It sounds like the rheostat on the float is bad and sending a bad signal. However, before tearing into the fuel tank, I would recommend having the BCM checked. The rheostat sends a signal to the BCM and then it goes to the gauge. This may cause a lot of headachs removing the tanks.
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Saturday, August 14th, 2010 AT 11:20 PM
Tiny
DUSTMAN
  • MEMBER
What is a BCM and how does one check it?

Also, someone mentioned a valve the switches from one tank to the other. Where might that be?

What might be causing the engine to stop when switching to rear gas tank? Engine will not start until switched back to front tank.
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Sunday, August 15th, 2010 AT 2:39 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
A BCM is a body control module. Basically, it runs several things on the vehicle's electronics. In 82, I believe they were behind the driver's side kick panel. You will need to have it checked.

As far as the tanks, that is a good question. When you switch it, have you checked to see if there is any fuel pressure from the bad tank? To me, it sounds like a wiring issue. Have you checed the wiring to the tanks for damage?
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Sunday, August 15th, 2010 AT 9:17 PM
Tiny
DUSTMAN
  • MEMBER
I'll have it checked out.

No, I have not checked the wiring yet on the rear tank. Just got the truck and am making a list of things to do.
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Monday, August 16th, 2010 AT 8:23 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Check wiring harness and wiring and let me know what you find.

Joe
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Monday, August 16th, 2010 AT 11:08 PM

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