Question is can I wire my prosport water temp gauge to the factory temp sensor? @ the same time as the stock gauge??

 

Hook it up and find out. Id assume the resistance is different between the two sensors but who knows you might get lucky. Keep us posted

 

In general, you can't hook up two gauges to the same sensor if the sensor is resistance based, because the resistance of the entire circuit will change causing false readings.

 

Both answers are sound ones.
Just to add though that using the stock sensor would entail cutting into the Harness right?..do you want to do that?
Some other choices would be not using the Stock sensor but using the Prosport sensor in the Stock location..OR using both sensors with either a adaptive T fitting,sharing the stock location.... or a totally separate spot to place the Sensor.

 

Will the car still run properly if I unplug the stock sensor for the ecu will no longer know the water temp. Any suggestions on a good place to put the pro sport sensor? And thanks for the replies

Scott

 

The temp sender for the gauge is just that..For the Gauge.
There are other Sensors that monitor the engine temps and are hooked to the Ecu that should rightfully stay where they are and not have anything else hooked to them.
As I said there are options which I stated.
I also found this:
http://www.davidgeesaman.com/rx7/Wat...%20Install.pdf

 

Sweet! thank you for the help, going to tackle this today