Originally Posted by sedanbob
I am at a loss here too. All the factory temp sensors I looked up are variable resistance types, but have a connector with two leads which makes me think they don't ground to the head/block, but that one of the leads goes to a ground. Do your sensors have one or two leads?
Sensor has just a one wire lead, I know it worked until I switched heads. The old heads were an old casting, so the sender wasn't original. When i swaped heads, I simply ordered a sender for an 85 firebird, and installed, plugged in and that was it. Then I thought maybe the PO had installed some form of resistor in case the sender read differently then the factory. So I traced the wire back into the harness and could find nothing. I just went out now, and pulled all the thread sealer of and reinstalled, no change.....so frustrating