Why does the gas gauge not work?

1999 FORD EXPLORER
336,000 MILES • 4.0L • V6 • 4WD • AUTOMATIC
Avatar
AARON SONNY NALE
  • MEMBER
  • 1 POST
The gas gauge doesn't work, and it's stuck beyond full.
Jul 20, 2022 at 3:22 PM
Advertisement
Avatar
SQM
  • Experienced Mechanic
  • 6,383 POSTS
Hello,

This could be due to a faulty fuel level sending unit.
The sending unit consists of a float that attaches to a resistor panel.
Over time the float can get stuck in a certain position, or the resistor can go bad and display incorrect fuel gauge reading.
The sending unit is part of the fuel pump assembly, located in the fuel tank.

I have attached diagrams below for your reference.

Let me know of any questions.
Thank you.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump
Jul 21, 2022 at 12:03 AM
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.