I just swapped a B18c1 (OBD2) into my 1995 integra (OBD1) Every wire in the bay hooked up besides one on the passenger side. Wondering if it’s just a sensor or if it’s really needed for it to run. If anyone can help me out that’d be great!

This one is the one in my car

This one is from the engine so they won’t line up

 

Does the car start and run? it might be for the Evap system I don't think the OBD1 has that.

 

First pic looks like canister sensor.

Second pic looks like speed sensor.

 

ive looked it up it’s a crank fluctuation sensor, and it won’t start

 

if your running obd2 ecu I think the ecu is tryin to search for that sensor. You can try this if your running obd2 ecu. https://honda-tech.com/forums/tech-m...ensor-1029958/

if your Obd1 ecu then it shouldn’t look for it and should start. Meaning there is something else not making it start besides that crank sensor.