gauge jumps about 1/4 when key turns on then falls to empty.
Aug 20, 2021 at 6:21 AM
fuel gauge not working properly
1989 FORD F-150
CHIPMB63
- MEMBER
- 1 POST
- FOLLOW
Advertisement
Hello,
It sounds like you have a faulty fuel sending unit for the gauge.
The fuel sender consists of a variable resistor, it is controlled by float that is attached, which goes up and down with the fuel level. Over time with all the up and down motion the resistor will fault.
Resistance should be 160 ohms (full tank) to 15 ohms (empty tank).
The sending unit is located inside the tank.
https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump
Please let me know of any questions.
Thank you.
It sounds like you have a faulty fuel sending unit for the gauge.
The fuel sender consists of a variable resistor, it is controlled by float that is attached, which goes up and down with the fuel level. Over time with all the up and down motion the resistor will fault.
Resistance should be 160 ohms (full tank) to 15 ohms (empty tank).
The sending unit is located inside the tank.
https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump
Please let me know of any questions.
Thank you.
Images (Click to enlarge)
Aug 20, 2021 at 9:46 AM