what is the sensor that is on the back of the front cover near the water pump? its next to the green plug water temp sensor. it has 2 wires going into it which lead to a connection then into the loom. what is this sensor for? can i leave it unplugged?

thanks

 

oh my car is series 4 rx7 13b jap spec turbo

 

Got a picture? I have an S4 J-spec engine, but I don't have another plug next to the water temp sensor.

 

I always wondered this myself...never could sort it out (never tried, actually). My '86 and my '87 both had the same setup...a temp sensor and another sensor. I think it probably had to do with the emissions nonsense.

 

heheh well on my car both of the wires had frayed and broken so i duno whether to try and fix it as its going to be hard and i dont know which is positive and negative.

it needs a 21mm socket/wrench to remove where the green plugged water temp sensor is only 19mm

 

Oh most of those are resistor style sensors...they won't be polar.