Quote Originally Posted by Tip12345 View Post
Hi brains trust ,
I did some testing over the weekend. I got a 500 ohm linear pot and made a test rig for the Gauge.
Disconnected the temp sensor and put the pot between the wire and earth .
This is what I found . there is a flat pot in the middle of the gauge …. it goes up nicely to the middle and then gets sort of stuck (maybe)
then goes flat out to the stop .just like when its on the sender .. so the plot thickens what to do .
might get another dash and have a play . there might be some sort of Damper in the gauge .ether mechanical or electronic .
just thinking out loud here ….. could be a capacitor that's not playing nice .
Thats exactly what they (factory temp) are supposed to do.

The manuf of almost all passenger vehicles run a suppressed mid range (or normal range if you prefer) so that the gauge isn't dancing all over the place like a direct ratiometer version will.