Coolant Temp Sensor Questions

It seems like my car is down on power after “legally” racing a friend of mine.

Anyone know where I can purchase one besides dealership? Is there a way of testing the one I currently have or should they be changed at set intervals anyways? What else could be causing the engine to be down on power besides having 214 km?

Thanks

to test it just unplug it,if its working ure engine should idle up,if its not working engine will do nothing

Is it the one for your gauge or ECU? Some cars have two. I’m not sure about the 240’s though…

Im pretty sure he is talking about the one for the ECU considering the one for the guage does nothing. They cost about $35 from the dealership.

"Although the car seems to drive fine, the dyno chart showed the engine down on power all across and a huge chunk of power loss between 3500RPM and 5250RPM. Scratching our heads, we were confused as to what was causing this loss in power, as the car only put out 110 rear wheel horsepower (RWHP) on the dyno. For comparison purposes with even 20% drivetrain loss the car should put out at least 124RWHP with the stock engine! We were down at least 10 ponies and needed to find out why it was losing power.

Thank goodness for our staff writer Mike Kojima! Mike has access to the Nissan CONSULT diagnostics tool (it uses the CONSULT port found on all OBD-I/II compliant cars to diagnose problems with the engine control unit, aka ECU), and after plugging it into our S13 we found that the coolant temperature sensor was malfunctioning. We also verified the readings by plugging in a Techtom MDM-100 display, which showed us a wild range of temperature sensor readings from -10 degrees C to 75 degrees C… at cold startup! (The coolant temperature sensor can be seen as the red plug towards the right).

We contacted Mike Jurado of Superior Nissan in Puente Hills, CA for a replacement temperature sensor, and replaced the probe and re-bled the cooling system within 30 minutes. After a few days of driving we went back on the dyno and re-tested the baseline readings of the car. Just as expected, the car made much more power on the roller. The car put out 120.7 RWHP @ 5200RPM and 132.8 ft-lb @ 4200RPM. But what is impressive about this engine is the amount of torque it has: more than 95% of the torque is available from 1500RPM through 5500RPM."

Is this a common problem on 240’s?

I changed mine but didnt notice any difference. Any the car feature in that article was pretty weak considering stock KADE’S usually put down close to 130 stock.

[quote="geniusevilright).

Is this a common problem on 240’s?[/quote]
Yes, Nissan’s in general through the 90s

So what is the procedure to change the temp sensor on the 240?? I know just unscrew it and put the new one in, but I had heard that you have to reset the ecu or something in order for it to work properly??