Magical fuel gauge

[volcomsnow245]

Ok guys first of all I wanted to start off by saying I am a certified technician and I understand what I'm doing. Now here's the story, I had a small leak on the bottom of my gas tank and I bought a good one and had the studs on top redone. Well yesterday I installed the tank and everything went good. When I reinstalled the fuel pump my gauge is past E in the negative zone. If I take it out an move the floater it will go to any level I want. I know it's not hung up because its exactly how it was. I had a few wires break but I properly fixed them and the car runs. I'm just not sure why the gauge won't work. Also my gas light is stuck on too.

 

[Ghost_92TSi]

Did you disconnect the battery? I would try and fill it up. Unplug the battery/ clip for the sender. Wait a bit andpPlug it back in and see.

 

[volcomsnow245]

Ok but I Can make the gauge move when It's out side of the tank. Are you saying out it in and disconnect the battery then see?

 

[92AWDHX40]

You may need a fuel sending unit similar problem here got a new one problem fixed.

 

[volcomsnow245]

What exactly happened to yours? It's odd that it was working until I put it back in the tank.

 

[92AWDHX40]

Its a old part it just went bad the car is 22 years old or so, a new one solved the problem.

 

[volcomsnow245]

True, ill have to check the dsm shop by me. It's just weird it works outside of the tank.

 

[Ghost_92TSi]

There is the little block hollow box floater. I would imagine with the car in the "on" position you could lift it up and down to simulate full and empty. I would pull the MPI( Same on 2g?) To keep the pump from "dry priming" while you have it out of the tank.

 

[volcomsnow245]

Yea that's what I was doing. As soon as I set it in the tank the gauge just falls Down again. It's really puzzling, I'm gunna go out there and take another look at it. This is day 2 trying to diagnose it.

 

[92AWDHX40]

Got mine from stm just ordered it last week, good price, call up Jeremy or brian and they'll take care of you.

 

[TSicktalon]

How much gas is in the tank?

 

[volcomsnow245]

$25 dollars worth, the pump is contacting it.

 

[icekilla126]

I can't remember if our floaters are hollow or not. If they are there is a chance yours has a hole in it causing it to sink. Or your sending unit is just going bad.

 

[volcomsnow245]

I'm going to try to test the floater with water or something and ill get back.

 

[92AWDHX40]

I thought the problem was the floater not.

 

[icekilla126]

Water is denser than gasoline. Theoretically if your float is full of gas it will float in water.

 

[volcomsnow245]

Okay so my float is fine I tested it in the tank. as soon as I put the sending unit in the tank it drops all the way negative. We are so confused. I think I'm going to buy another but I'm just worried this isn't the problem because It reads fine untill it's inside the tank.