I just purchased this '96 Prelude Si and I was told by the previous owner that these two connectors are unplugged but he had no idea where they went. so maybe you all can help me.
Both are on the drivers side near the intake manifold. One is a gray circular plug and the other is a green circular plug.
Then theres numerous plugs under the dash with no where to go, or so I don't know

second thing, look at my other pic. Why do you think they rigged the tps up like that? I haven't crank it up because someone stole the cat conv while in previous owners possession. I heard it run, and it was loud as ever of course......

It has a CEL on but when I hook my machine, it wont read anything.

 

The two circular plugs are probably gonna be IAB and iacv?? Just a guess, but iab is hard to see from upper-bay...you have to be a psychic to know its under the intake manifold on the drivers side. and the iacv is usually right in the middle of the intake manifold (about 1" from the fuel rail) and it is often deleted, especially with intake manifold upgrades.

 

ok cool thanks. ill check those two areas out. Anyone else have any idea about the interior hanging plugs?

 

one plug is probably for the knock sensor (which is located on the top rear of the block in the middle (~between cyl 2 & 3) and the other the IAB

my SH is in the shop right now, so I cannot check for you until next week sometime

 

Very helpful and correct. that's why I love Honda-tech, even though I was rarely getting on lately because I sold my Hondas. Unfortunately though after researching and looking for pics, I discovered that theres no IAB on the car, so thats why its unplugged.