I am still having problems with this.
I replaced the new sending unit with another new sending unit and I am having the same problems. The gauge shows a hair above E. I put in 10+ gallons of gas.
Before I replaced the 1st sending unit, I did what you suggested above and I disconnected the sending unit wire going to the gauge and it showed E then I grounded it to the body and then it went to F or a little past F. Maybe it was the opposite, grounding the wire goes to E and just having the wire disconnected it goes to F. Sorry I don't remember but all I know is it went from E to F doing one of those ways.
That is when I replaced the sending unit.
Then another one.
Now the tank is installed again with the 2nd sending unit & 10 gallons of gas. If I disconnect the sending unit wire the gauge goes to F.
So it seems like something near the sending unit again? The wire that attaches to the sending unit that attaches at the rear body harness I tested for continuity as much as possible by bending the wire around and didn't find any breaks.
So does anyone have any other suggestions?
If I need to drop the tank again
I have a couple questions.
The tank isn't rusted but has a slimy film on the bottom. Is it safe to clean and rinse it with acetone and or soap and water as long as I make sure it is completely dry before using it?
Is that going to promote rust?
Can I use the water in the tank and test the sending unit or will that ruin the sending unit or not give me enough resistance (or too much) to test the sending unit?
My garage smells like it will go BOOM with the flick of the light switch
I was just wondering if the float is getting stuck at the bottom of the tank and would be easier to test out of the car with water if possible.
Or I read on a different site and a different car but he was having a problem with the metal ribbon going from the wire post to the resister was touching the tank itself on 2 new sending units.
Any ideas on what could be the problem? and is it OK to clean & rinse with water and use water to test the sending unit in the tank to help with troubleshooting this?