Using the 98 Camaro 3wire coolant sensor, pcm 40 Degrees hotter??

[Biggin0822]

Brand new speed hut gauges and using the above sensor so that 2 wires can go to pcm and one wire to the gauge. Gauge usually reads 158 and pcm reads 198. Any ideas?

 

[yevgenievich]

Resistance mismatch for the gauge? I used a pot to adjust gauge to read same as the computer before.

 

[Biggin0822]

Resistance mismatch for the gauge? I used a pot to adjust gauge to read same as the computer before.

How do you do that?

 

[yevgenievich]

You can get a potentiometer and install with two closest legs in series of wires running to the gauge. Adjust to read same as the computer is showing. It will not be very accurate at lower ranges and higher ranges but will show correctly for the usual range.