fuel gauge fluctuating on non A-body Dodge Van

[cudajim]

So I have a 94 Dodge Van 318 with a 36 gallon tank. The fuel gauge moves erratically and I can never tell how much fuel I have in the tank. I suspect a local voltage regulator problem if there is one near the gauge but I don't want to tear into it till I have a clue what to look for. Any ideas?

 

[scoot439]

Check the ground strap from the sender outlet to the fuel line.