Dash Temp Gauge still not working right

[Tony_SS]

97 350
I grounded the wire and the dash gauge showed as hot as it could read, so I determined that the head sensor was bad. I replaced the whole sensor and it came with a wire and connector. Installed that and I still get the same reading, ~ 150º at full operating temp.

Any ideas???

 

[kkirwan71]

Try the thermostat yet? My 90 did the same thing and my heat sucked

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[Rogue]

97 350
I grounded the wire and the dash gauge showed as hot as it could read, so I determined that the head sensor was bad. I replaced the whole sensor and it came with a wire and connector. Installed that and I still get the same reading, ~ 150º at full operating temp.

Any ideas???

Mine's been doing the same thing since I noticed it when I replaced the radiator in June. Thermostat is new....not sure yet if the sensor in the side of the block is bad, I haven't had time to wrestle with it. Following to see what the outcome is.

 

[Tony_SS]

Well I hooked up a scan gauge to confirm that my temp is going no higher than 166*, so I can assume it has a 160* tstat. It was a Florida truck and had a KN intake on it so maybe the PO thought he had a hot rod and it needed a 160. IDK. I'm replacing with a 195* and will keep everyone updated.