Sending Unit Reporting Incorrectly

[atwork]

Hi guys,

I've got a 92 stock fuel-injected Festy.

I replaced the fuel tank on her last summer, and pulled the sending unit/pump out of the old tank to put in the new one. After it was all put back together, I noticed right away that the sending unit was not accurately displaying fuel level in the tank. If anything, it was "indecisive". Sometimes, it would read full with no gas in it. Other times, it would read half full with a full tank. It doesn't ever read as empty.

I've accidentally run out of gas twice since this happened, and I'd like to get it figured out. The terminals all seem to be in good shape, with no corrosion. The tank is the same design as the one it replaced, and when I pull the sending unit out of the tank and manually articulate it, it displays accurately.

When I install the sending unit back into the tank, I've taken notice to see if the arm makes contact with the bottom or side of the tank, and it doesn't appear to. I'm really stumped.

Anybody maybe have a different, newer and working sending unit I could buy off you? I need the one with included fuel pump, since this is the fuel injected model. The tank seal is oval-shaped, not round.

[georgeb]

Mine was running out of gas with 2 gallons left. It wasn't the gauge because I made it to a station and it only took 7.9 gals. Turns out there was no sock which extended the reach to the bottom of the tank. Check for this on your car and make sure that the sock is at the rear. While you have the assembly out, hook it up and run it through it's travel while watching the gauge (key on). Be careful with open tank! Ground yourself and tools often to discharge static electricity. I got a pump with sock on ebay for $26.

[FestYboy]

george, his issue isn't the lack of fuel, it's the inconsistant gauge reading. Atwork, when you removed the sending unit, did you happen to peal back the cover for the wiper arm and inspect the coil and arm contacts? it's easily removed with a pair of needle nose pliers. i'll suspect that this point that the coil is broken and wiping across damaged pieces causing the wild readings. also, the polarity may be backward....