Floating gas gauge

Put in a new sending unit and checked all the wiring.... the gas guage seems to float wherever it wants to. It won't provide an accurate reading. Do I need a new gas gauge or is there something else I can check?

I am not sure if this will help...but is it well grounded. Or is it being grounded through just the tank straps holding the tank up. I would start with running a ground wire off the tank to the frame, and be sure all connections are clean and use that dielectric ( or what ever it's called) grease on all ground connections. Also be sure that the hole in the tank where the sending unit goes is also clean and free of rust for better ground. Just my 2 cents on it...

Hey Smith1989,

Big W is right, check your grounds. I have fixed quite
a few fuel gauges for friends. I made a thread on here
to show the steps to take to find out if gauges and other circuits work. The order you do this stuff is important:

https://vintage-vans.forumotion.com/t14006-fuel-gauge-sender-diagnostics

Have fun,
George

Great article George. Just dropped my tank to clean out, was going to get a new sending unit but after reading your writeup I think I'll try to salvage the old one.

For sure Linoman!

I have yet to find a re-popped sender that has comparable quality of the originals. Post any questions you have on that thread, I'll try to answer. Or PM me.
Best of luck!
George