1986 Ford F250 Second fuel tank not working

1986 FORD F-250
177,600 MILES • V8 • 2WD • AUTOMATIC
Avatar
WAYWRD
  • MEMBER
  • 2 POSTS
We have a 1986 ford f250 3/4 ton pick-up. we purchased it about 3 years ago. Originally the second fuel tank worked fine. About a year ago it stop working. When you flip the relay switch the fuel gauge goes to empty (even though tank is full). we're not even sure where to start looking for the problem. My dh says possibly the floater?? Any help will be appreciated.

Thanks
Mar 30, 2008 at 5:55 PM
Advertisement
Avatar
BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
does it pump fuel out of the second type, just it doesnt say if it has fuel in it?
Mar 30, 2008 at 6:03 PM
Avatar
WAYWRD
  • MEMBER
  • 2 POSTS


I should have been more specific, sorry. The fuel gauge for the second tank goes to empty and will stop running, as though it were out of gas.
Mar 30, 2008 at 7:39 PM
Avatar
BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
check the fuel tank relay and the fuses. with the switch flipped check for voltage at the pump.
Mar 30, 2008 at 7:48 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.