IS300 running cold? High idle always, temp sensor resistor questions
Car is somewhat heavily modified (Aristo swap, single turbo, bolt ons etc.), but still usually operates and runs like a stock is300.
My cooling system consists of:
160 degree thermostat
fans kick on 10 degrees colder than normal
However, my car used to somewhat heat up all the way and idle normally and perfect, now the temp gauge doesn't go past 1/4 way up from cold and runs really cold, the idle is up around 3000rpm when cold and never gets down to the normal 1000 rpm that it used to be at. I replaced the thermostat already and it made no change, I have noticed when I pull the connector to the temp sensor the idle drops 1000 rpm and temp gauge stops working. When the car finally gets to halfway between halfway point and cold the idle drops down to 2000rpm but will never get to the midpoint.
I'm assuming my temp sensor is bad, when I pull the connector and jump the connector with a paperclip the idle drops down to 1900rpm, from what I know about these sensors is that when the resistance becomes low, the car is hot and therefore drops the idle down.
To add to everything when I used to drive the car on the highway when everything heated up and acted normally, the temp would drop significantly to 1/4 up from cold and cause the idle to jump up at exit stop lights. I never thought these performance radiators made this much of a difference and it kind of bugs me so I was thinking of adding a resistor to the plug of the sensor therefore making it think it was always at normal operating temp and install an aftermarket water temp gauge somewhere in the vehicle. The question is, what would be the correct resistor in ohm's to buy to make it do what I would like it to do.