I am wiring in my 4 wire O2 sensor and I need to know which wire to wire to and where the Air intake sensor is located, there are several good candidates. The other question is that one of the black wires needs to go to ground. Where does the engine harness ground out? Thanks

 

ttt

 

this is on a D16Z6 dropped into a 95 CX

 

the engine harness grounds on the block where the lower radiator hose connects to the engine. The intake temp sense is a white plug on the front and top of the intake manifold. as for the O2, just go color to color and youll be ok..

 

what he said