checked on my rb20, the top coolant pipe has 2 sensors plugged in, one is a single wire clip the other is a 2 wire clip. the single wire is for the temp gauge, when pulled out the temp drops to nothing. the other 2 wire clip does nothing when pulled out ???? maybe this is the info the computer reads ????
2moro i will unbolt both the sensors and have a visual inspection inside.
chow for now :-)