99 COncorde Gas gauge Problems!!!

I have a 99 concorde that has this weird problem. I know if is common so I hope someone out there knows this already. The Gas gauge goes to fuel then to e, then back to f for a while.. Then this repeats constantly. I though that the ignition switch might be reading bad, but previuos threads tell a different problem. Can't remember what it is so If you guy outh there remember please refresh me on it. I think it was the sensor in the tank.. or something.

Thanks..:banghead:

I have had that happen with another vrhicle type, and it was solved by replacing the guage itself. Good luck
de rob