i have a serious problem with the car everytime i give the car a ride the temp needle goes up and down,and coolant light goes on and off ,i thing ill have an air bubble so i flushed the radiator ,check the thermosthat and the problem persist i thing the stock temp sensor just gave up ,let me know what you thinkg.

thanks

 

The stock coolant/water temp sensor stays centered most of time (b/w C and H...more towards C. You will never know if your car is about to overheat...!)and doesn't bounce from what I know...only the oil pressure does the bouncing. If you don't have an aftermarket water temp gauge..I highly suggest getting one...may be one of your best mod/investments ever for an FD. There are a lot of topics on coolant llight going off/on..check it out via search.

 

yes but then i reaaly dont know how to tell if the sensor is in good shape or not or maybe my thermostat is not trigerring well i dont know really.

thanks

 

Use the FSM (Factory Service Manual):


https://www.rx7club.com/3rd-generation-specific-1993-2002-16/94-fsms-available-download-449950/

It gives you procedures on how to test sensors and the t-stat.