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Discussion Starter · #1 ·
This is driving me nuts. My water temperature in my 70SS454 (orgional) el camino is not working. If I take the wire from sending unit and ground it the water gauge jumps from below 100 to way over 250. So, I know the gauge is good. I tryed the sending unit in both the intake manifold (aluminum) and in the cylinder head (cast iron - for the time being) and the gauge does not move off of 100.

bad sending unit? Its brand new so... any ideas are appreciated.
 
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