Another Temp Sending Unit rant
Thread Starter
Instructor
Joined: Feb 2026
Posts: 159
Likes: 20
From: Scottsdale AZ
I assume that you did insert the pot in the green wire circuit. Note that the pot is a 10-turn unit and is not limited to a single revolution unless you are near one end. Checking it with an ohmmeter will tell you if it's working as intended. You are now in the territory of why almost all modern temperature gauges don't directly convert resistance or current to temperature but ask the ECM to do a table lookup before sending an appropriate voltage level to the gauge.
And would tightening the screw lower or raise the read temp at gauge?
Racer
Joined: Aug 2025
Posts: 253
Likes: 268
From: Mid Michigan
I just bought this one. I will get next weekend and see if it fixes my issue. My Aces system has an engine coolant sensor but I want my analog gauge to be somewhat accurate.
Corvette Temperature Sending Unit 1958-1967 | Restoration Parts https://share.google/e3WeghErT8BKa8c5u
Corvette Temperature Sending Unit 1958-1967 | Restoration Parts https://share.google/e3WeghErT8BKa8c5u
Race Director
Joined: Feb 2007
Posts: 15,468
Likes: 8,950
From: northern california
C2 of Year Finalist (track prepared) 2019
This thread explains the problem in boring detail:
Temp senders - click here
