I have had a problem with my fuel gage since I bought the car, it would give a good reading then go to all the way full and put the low fuel light on. It was a naging problem, that I thought that would be cured by installing a new fuel sending unit in it, and it did, for a little while. Now it just gives me an inconsistant reading, all the time. Is it common to have a bad spot in the harness in one area, or could it actually be in the gage cluster. Any help would be appreciated, thanks in advance 