Ok, i have a question/problem for you guys. i am putting in a jdm h22a into my 94 accord coupe. I know i have to run the knock sensor, an aib sensor wires to the ecu. But heres the problem, my ex wiring harness seems to already have a plug for the aib. unless, it isn't what i think it is. the aib sensor is the sensor on the little black tank underneath the intake manifold, is it not? if so my stock ex wiring harness already has a plug. secondly, i seem to have a mysterious sensor. there is no plug for it, and i dont know what it is. it is on top of the fuel rail. there are too vaccum hoses running to it. one runs from the fuel pressure regulator, to it. and then other one runs from it, to the intake manfold. what is this sensor? and where do i run the wires for it?? i would post a pic., but i dont know how???

any and all help would be much appreciated. this is my first motor swap, so i am still learning

 

i only remember running a knock on mine when i did it 2 or 3 years ago. i dont remember adding any other wires.

ran a knock, switched a6 and a11, extended like 4 wires on the engine harness in the bay.

the only sensor i can think of that is near the fuel rail is the IAC