Alright so I did a full 1j swap in my sc300 I was trying to tune it but notice my temp gauge was slowly rising. I first thought getting to normal but kept rising higher so shut off car and wait a few. I also have a aftermarket temp gauge and it was holding at 180 then start rising slowly. I have electric fans as well, I open the radiator cap to see if water is flowing but see no movement. So I tried to opening the top hose to see if water come out none. I searching everywhere to get answer need them fast so I either replace it.

The car having a little miss fire but really don't have much gas the smoke is fine since I only have a downpipe on it now for the time being no white smoke or sweet smell

 

Any leaks? Also how old is the pump

 

As mentioned above check for coolant leaks. fill up your radiator and run the engine to check for leaks. Also is your electric fans efficent enough to cool the car?

 

If water is nof moving i would suspect a bad water pump. I would also look at the thermostat. the electric fans should be sufficient to move air if they are 12 inch each. When do they turn on?

 

Was the pump working before the swap, or did it come with the motor? If no fluid is moving, it almost has to be the pump...or a massive leak!

 

It was the thermostat thanks for the advice engine out of a car