Last summer I changed the fuel pump out in my 92 Camaro RS. I changed it form a TBI to a TPI pump. I reconnected everything together and made sure the pump worked. I then put the tank back up and drove it happilly, untill....

I now have a non-functioning gas gauge. It worked 100% until I replaced the pump. What the gauge will do now is sit way past the full mark and stay there. It will only move when I am low on gas and take a sharp turn. Then it will register (for a second) what is probably the correct amount of around 1/2 tank.

I have chased the issue around for a while, checked lines, connections, fuses, pulled the instrument cluster and ran a few resistance checks. I am still stumped though. Could it be a problem with the sending unit being hung up on something?

 

That would be my guess. Time to pull that tank. After you do it 3-4 times it gets easier.

 

I can pull the tank, but it will be a waste of time if I do not know what I am looking for.

 

Well, pull it to check and see if the sender is hanging up on anything. You might want to check the in-tank wires as well, as there might be some that are touching, creating a short on your sender/fuel gauge.