I had my mechanic install a used fuel tank, new Fiero store sending unit, and new AC Delco fuel pump about 5 months and 5,000 miles ago. Fuel gauge behaved normally for these 5,000 miles. The car then went in to have the front control arm bushings replaced. Upon getting the car back, the fuel gauge spins in complete circles. Not the normal "my car has no tank baffles" fluctuation while driving, but random pegging so hard to full that it actually does full 360s. My mechanic is blaming it on the sending unit, which of course he does not warranty. During the bushing replacement, plugs and wires were also replaced. I notice that the wires for the front 3 cylinders are suspiciously close to the 3 wire connector for the sending unit. My questions are-has anybody had this issue? How was it resolved? Will NOT resolving it cause damage to the gauge itself, or would it just continue to be an annoyance? The quality of materials, packaging methods and service from TFS has been less than impressive up to this point, so I would be lying if I said that I have a tremendous amount of faith in this sending unit. Thanks.
[This message has been edited by AstroBDean (edited 06-05-2014).]