Reply to "Seeking advice regarding how to trouble shoot a temperature gauge that doesn't work."

Chris, I suspect the 'vacuum sensor' you refer to is a temperature actuated distributor retard system use to supplement early smog controls. Virtually all those things in the US were binned immediately after the car was bought. When they work, they foul up your tuning efforts and when they don't, things get worse. Disconnect and see if the ignition timing changes. Then reset to optimum.
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