Can someone help me understand what the problem may be with my fuel gauge showing improper readings???

2005 PONTIAC BONNEVILLE
37,000 MILES
Avatar
IBDAROBMAN
  • MEMBER
  • 1 POST
My fuel gauge gives an improper reading even after I've put gas in it...Sometimes it shows have full when there's less that that much gas in it...It sometimes shows just above empty when I've put 6 to 8 gallons in it...
Dec 16, 2011 at 6:18 PM
Advertisement
Avatar
FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
Most often it is related to the sending unit, and the fingers on the float arm that contact the resistance card. This higher than specified resistance will cause erroneous readings in the fuel gauge, and it can relate to how much fuel is sloshing around in the tank. Replace the sending unit, accessible through an access panel in the trunk, under the floor carpet panel.
Dec 16, 2011 at 6:31 PM
Avatar
CADIEMAN
  • ✓ASE Certified Mechanic
  • 3,544 POSTS
  • ASE Certified Mechanic
youll need to drop the fuel tank and replace the fuel tank sending unit.i would replace the fuel pump whyll in there.ty for using 2carpros
Dec 16, 2011 at 6:35 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.