Replaced factory temp gauge with another one.......

Found out after testing the old temp gauge that it was bad (IVR was smoked, had 13 volts going to the gauges instead of 5!!!), replaced it with a good tested unit (Thanks Tony!!!) and an IVR I built (cost me $12 from Radio Shack, SOLID 5 VOLTS!!!). Temp gauge works as it should now, but now no GAS gauge!!!! Wondering if that gauge is dead as well.......