Did you follow the instructions when you converted to the IVR? The limiter was originally mechanically built into the fuel gauge. The reostat needs to be disabled [ie, bent out of the way of the circuit.
You mean "limiter". All the gauges run on 6volts from the limiter. Each gauge has a separate sender. If your fuel gauge works [somewhat] that sender [in tank] needs adjusting. The aftermarket temp senders are all bad. The ohmage is always too high, thus your gauge never receives much voltage...
Sounds like a bad sender. Your gauge is getting full 6 volts. It usually goes the other way, ie. never reaches temp on the gauge. Hope you didn't burn out your gauge.
Where did you find a NOS temp sender. I have tried over a dozen aftermarket of various brands. All read high ohmage when engine fully warm and gauge reads barely 1/4. Set up a fixture to substantiate.