cdrag264

When my engine is running, my fuel gauge pegs at bottom of gauge, when ignition switch is off it goes to correct reading. What could be the problem? Thanks

Vitaminmopar

First task I would perform is to visually and physically check the wiring connections at the sending unit on the tank.

Frankie the Fink

Unlike other generations of Corvettes the midyear sending units are "powered" - meaning ignition voltage goes to the tank unit...when your ignition is off the indication is just "floating" as there is no power to the sender, when you power up (ignition one) the sending unit is getting juice but something is wrong with the wiring or the ground.... The sender terminals are different sizes so hard to mix up - but confirm the connections are correct, and tight, and no wiring is pinched or frayed..

You can use this guide for detailed troubleshooting:

cdrag264

Found the connection not to be tight, R & R it and works. Thanks

Frankie the Fink

Good - the simple fixes are always the best !