im currently wiring up a defi temperature sensor to my psi3 monitor, the sensor wont be installed into the block until friday but i managed to test it anyway.

i wired it up to which is the correct terminals on the wiring diagram and i get a reading of 50*C, i tried the sensor in a cup of boiled water and it didnt move a single digit!

i then decided to pull the sensor out of the harness while wired up and the reading shot up to 136*C!

i plugged it back in and it went to 50 again pulled out again to read 136

there are only two wires on the temp sensor, signal and ground.

any ideas? have i wired something wrong?

 

hi there,

I think the signal of the sensor doesn't fit to the gauge's one. buy a cheap sensor and test again. Don't think there's anything wrong with the wiring

cheers
Nico

 

i dont know what you mean nico, ive cut the defi wires and wired it into my psi3 monitor.

 

no sparkys got any ideas?

 

Maybe the sensor and the gauge work with differnet values for the resistance.
Lets say the sensor sees a 1 ohm load @ 0 degrees, and a 50ohm load at boiling point
(values are way of, but this is to make the example easier to understand for you and type for me) but the PSI sensor and gauge (the one supplied by them)use another scale(1 ohm 0 degrees and 100 ohm for 100 degrees/boiling)

That way your sensor and gauge will never work together, as the values between the sensor and the gauge are not the same.