Ever since I got it running, the gauge on my '88 GT was stuck quite a bit above the Full mark. I did some trouble shooting, including swapping in other spare gauges which gave the same result. I finally determined the problem was most likely the sending unit in the tank.
I dropped the tank yesterday to check it out.
The readings I am getting are 43 ohms empty, and 198 full.
So then I plugged the module 3 wire harness back into the chassis wire harness while the module assembly was still out of the tank and the float at the Empty position.
I turned on the ignition key, and for the first time the gauge needle move down to about have Half Full location. When I move the float to the Full position, is raised way above the Full mark once again.
It would be the easiest if I could get this aftermarket sending unit to work rather than replacing it, but I don't see any adjustment on it.
[This message has been edited by hdryder (edited 04-19-2015).]