welp, the guy i bought it off of said his mechanic looked at the sending unit and it wasnt that. Not sure what it could be. When i bought the car my mechanic looked at it and couldnt figure it out either. He even said that the module behind the dash that recieves info for the gauge was registering readings even w/ no power?!?. This is why I'm thinkin the previous owner replaced a bad fuel filter w/ the wrong one, not knowning there are two diferent fuel filters in the SVT. Just an thought that would cause the fuel readings to register wrong.