Check engine light at high RPM
Posted: Wed Apr 05, 2017 5:04 pm
I have a 85 GT-S with stock 16v and I'm getting a code 4- water temp sensor at about 5-6k and it will stay on while driving until I come to a stop and then the light will go away. Car will still run fine with no issues. I see 3 sensors together on the thermostat housing, I know the middle one is for the gauge, but I'm not sure which of the other 2 are for the ecu?