Just a heads up for anyone that runs into this. I replaced my Coolant sensor, and new replacement was faulty. On a multimeter, 20K resitance setting, our sensor should read around 17K. The brand new faulty one I got read 3K.

I found this out only after the sensor readout too high temp way too fast when the engine was running. Anyone doing a coolant sensor should run this test, as it take 2 min to test the leads.

Summary:

Good Sensor - 17K Ohms
Bad Sensor - 3K Ohms

Symptom: Car 'overheats' on gauges long before system can be bled. In addition the 1st and 2nd stage fan will come on very early as fail safes when a problem with the sensor is detected. Also the the car will stutter and run rough,this is because the ECU will artificially richen the mixture as another fail safe.

 

Good stuff to know. Going to move you to the Stock Problems/Issues area.