Gas light problem

[GeoffM]

When I first got my car, my gas light worked as it should. It stopped working when I tried to get the maximum miles out of a tank. My gas gauge works, just not my light. So, back when I was naive, I thought it was OK to go to the dealership for service.
They told me "The technician grounded 'I think he said fuel sending unit' and the light came on" So I know the light is good. Its something else somewhere. Any ideas? Also, whatever the technician did he removed the floor of the trunk to get at it.

[mtnbikaah]

lots of sludge in the tank

[GeoffM]

What are some other symptoms of that? I changed my fuel filter(Because I can), everywhere I read I was supposed to relieve the fuel system and my hands would get covered in the spraying gas. They didn't. Could this be because of sludge?

[vietkid_2006]

What are some other symptoms of that? I changed my fuel filter(Because I can), everywhere I read I was supposed to relieve the fuel system and my hands would get covered in the spraying gas. They didn't. Could this be because of sludge?

I'm not so sure about the sludge problem but with the pressure in the fuel system, you're suppose to open the gas cap before you change your filter or anything fuel related.

I never had any fuel spray on me when I changed my fuel filter.

[GeoffM]

I didn't think it was sludge either, because everything else works just fine. I had a full tank and opened and gas cap. I only get pressure(It seems) when my tank is low anyways. I did have some fuel leak on me though, I think that's to be expected. When I changed my fuel filter I almost ripped it off the firewall trying to get the lines to loosen. That's when I learned the value of wd-40.

[GeoffM]

Any other thoughts?