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Hello, I recently installed some gauges into my car and have noticed that the coolant temp will not break above 140*F (60*C) when im moving and will only get up to about 180*F(82*C) if im standing still for a few minutes. Im pretty sure the car has a stock thermostat and it does have electric fans that are wired to turn on at about 190*F(88*C). The fans have a probe sensor that is put into the rad ,which Im not a huge fan of. I also have noticed a few times the fans have turned on well before the car has gotten up to 190, and when im driving when its cold out, around 0*C the temp will rise and then actually fall way down to almost 110*F. Any input on this? Bad thermostat?  Thanks for any help.

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https://www.sau.com.au/forums/topic/473713-rb20-running-too-cold/
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50 minutes ago, Jordy32 said:

Where is the gauge getting it's reading from, out of the engine (top hose) or bottom?

I'd check or replace the thermostat, sounds like it's open or could be nismo item

Gauge is tapped into the top coolant hose.

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