Now I got your attention, can someone help me out. I'm new and I've been getting a lot of help reading everyone's post. I've searched and can't seem to find any help in particular to my problem. I'm swaping a 90 b18a into my 90 crx and I have a problem with a particular sensor. I don't know what the sensor is for but it's a green plug that's next to two other sensors on the back of the block next to the oil filter. I know that one of the sensor is the oil sending unit which is one wire. The next sensor has like two post sticking out and two wires would each slip over the two posts. The next one is a two wire green plug sensor. The crx engine didn't have that sensor so I do not know where to wire it up to. can some who has done this swap help me out or point me to a site that can help?

 

http://www.hasport.com/Tech/Wring/wiringb16.htm
this link help?

 

knock sensor maybe.......