Fuel gauge not working

Mrod76

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Need help, I have 97 sonoma 2.2 liter, fuel gauge only reads 1/4 tank when full and way below read when tank is low. I just changed the fuel pump and sending unit but did not work. Any thoughts would be appreciated.
 
My suggestions are:

If you replaced those parts with used ones, then maybe those parts are bad too.

If you bought them new, then double or triple check to make sure it's all hooked up correctly.

If that's been done, then my only other thought is that the gauge itself is defective. IDK if that entails replacing the whole insturment cluster as a unit, or if you can replace just the gauge. I've never looked at one enough to figure that out.

I know that I didn't really offer anything you probably haven't already thought of or done, but I hope it helps and I hope you figure it out. Good Luck!
 
I dont remember exactly what the resistance measurements should be from the sending unit but you could check it that way once you figure out what readings you should get. if they are correct then it would be your fuel gauge and not the sending unit. It could still be a wiring issue causing extra resistance but that would be a longshot at this time. Good luck
 


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