The temperature guage on my 1990 F250 diesel truck is registering all the way to the left on Cold all the time, even after several hours/miles of driving. The exhaust temp gauge and boost gauge don't seem to work either (unless they only work when a trailer is hooked up).
I was going to replace the thermostat first. Is this the right place to start?
Recently got a new tranny also, is there a temperature sensor related to that that could be causing problem?
Thanks,
Wes
Logic would seem to dicate that if you're experiencing problems with 3 gauges, the problem would lie in the instrument cluster or in the wiring leading to it.. Perhaps when you got the new tranny, the shop forgot to connect a harness somehwere?
The thermostat is not connected to the gauges. The gauge is controlled by a temperature sensor somewhere. The thermostat is purely mechanical and only affects the path of the coolant. If your engine was overheating, then checking the thermostat is a good idea.
HTH,
-D
The thermostat is also the place to start if the engine is NOT getting hot.
s
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