im trying to swap a obd 0 b18a1 into a 1991 civic si. I need pics of the si harness connected to the b18a1. Also, wanted to see a pic of a knock sensor wired hooked up to the ecu. I researched and it said wire the knock sensor to pin 23 on ecu, but shouldn't there be 2 wires. Pictures help clarify a lot of things

 

I don't think b18a1 came with a knock sensor.

 

yea ldo's right. No knock sensor for the b18a1 obd0, just curious, your running a PR4, right? There is an oil temp sensor on the back by the oil pressure and fan switch, but you dont need to hook it up. The knock sensor you dont have would be under the #2 cylinder intake runner on a b18c...

 

then wat is the green plug next to the alternator, ive searched and some say it's a knock sensor and should be wired to pin 23 on the ecu, and other people say it's not. Does anyone have a guide on how to wire b18a1 motor using a si engine harness, also yea im running a pr4