Where do GREMLINS live? They always surface when I touch anything electrical! I installed the dizzy and box and now my water temp gauge shoots to 250* as soon as the engine starts. That is typically a ground yes? I rewired it and same result I did install a new lower profile sending unit with the new dizzy. Could that be bad? As an aside, what a difference the MSD makes!! Unreal from a simple bolt-on.
Could be the wrong resistance/thermistor senser. Do not use Teflon tape, pipe dope, or any other material on the threads on the sending unit.
Hey, easy ! no teflon, I can try another unit. now have to pull the dizzy to remove it though. major PITA...
By the way, new gauge AND sending unit tongght, same issue. I hate gremlins.. Driving to the car show w/o temps. Hate that!