Have used this site to build the MS3 for my 97 Miata https://trubokitty.com/#/ms3xassembly

I have tried both the firmware linked to from that site (1.4.1) https://trubokitty.com/#/tune and the newest from DIYAutotune links (1.5.1) Megasquirt Downloads Firmware and Software - Megasquirt EFI

I did find this link​​​​ that sounds like the same issue I was having, and they fixed it by changing the sensor, butI changed mine and no change. Megasquirt Support Forum (MSEXTRA) ? Coolant temp reading gone wacky (Solved) (View topic)

Both AIT and CLT sensors are working just fine with my Rev built MS2, is just CLT with the MS3 is off. The math looks like it is doing C to F conversion but I do not have anywhere to change this. As if it is 82F, it then converts 82C to F and then shows me 180F

 

There's a whole sensor calibration step that you might have missed. Mega Miata: Sensors and out puts calibration

 

This section?




If so, yes, I did that calibration and it is still off

 

No idea, took everything out of the car again, put it back in the next day, and now everything is working fine, not sure.