Which sensor to trust ???
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Junior Member
Joined: Nov 2001
Posts: 84
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From: Durmersheim / Germany
Car: 1985 IROC-Z28
Engine: TPI 350
Transmission: TH700-R4
Which sensor to trust ???
Hello to everybody !
I have 2 new coolant temperature sensors ( one for the instrument and one for the ECM ). When my fan kicks on, my instrument shows near to the red, but the scanner shows about 220 degrees. Which one should I trust, I´m a little bit scared of overheating my engine ???
Thanks,
Uwe
I have 2 new coolant temperature sensors ( one for the instrument and one for the ECM ). When my fan kicks on, my instrument shows near to the red, but the scanner shows about 220 degrees. Which one should I trust, I´m a little bit scared of overheating my engine ???
Thanks,
Uwe
Supreme Member
Joined: Jan 2002
Posts: 1,322
Likes: 1
From: Bloomingdale,IL
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
The fan switch kicks on around 220 so i would be inclined to trust that the ecm is seening the "correct" temp. An easy way to figure out if the ecm temp is correct would be to unscrew the sensor for it and put it in a known temperature of water. Then check the reading on the scan tool to see if it is the correct reading.
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