Kinda of long story, but to make it short. My car was originally a 95 ls. Bought a JDM b18cr motor, a 98, and it came with the ecu. My freind who dropped the motor in for me, kinda modified the original LS wiring harness. I got a obd2-obd1 harness so i could use the OBD2 ecu. Problems kept arising, so this other guy said to just get a obd1 ecu. I know, retarded.

Anyhow, theres this black thing on the manifold part, which I was told is a pressure switch which activates some IAT relay...mines had nothing hooked on.