Would somebody please tell me the purpose of these plugs which I found on the back of this B16a:










I'll be needing another one of these, so if someone has a spare just lemme know..




I found a wire on the engine harness near the above plugs without a connector. I'm wondering what the missing connector looks like..




Any help is much appreciated!




Modified by 8point6 at 8:32 PM 7/27/2008

 

the upper sensor thats broken is a knock sensor i believe, someone correct me if i'm wrong, i mostly deal with SOHCs so i don't see many knock sensors. Next sensor down i'm unsure of, the lowest sensor with the connector attached and no wire going to it is the oil pressure sending unit, thats also what the yellow/red wire goes to.

 

what he said ^ i believe is correct. The center plug there is your radiator fan switch.

 

Broken one for sure is the knock sensor.

 

knock,oil, and fan switch

 

Alright, thanks.

Just out of curiousity, does anyone know how the engine would be affected if it was ran without an oil pressure sending unit, or without a knock sensor?

 

not too sure about the oil, but the knock sensor will cause you to throw a code, and in most cases it will not let vtec function properly. I would think that the oil sending unit would also keep vtec from engaging properly.