I have a 94 civic hatch and i just swapped a b18b in it. I kept my old hardness from the d15 and reused it for the b18. Everything plugged up fine except one plug, i think its the intake air temperature sensor because i have a cel for it. There is no where for it to plug into and i need to smog my car but i can't with a cel. The b18 is jdm if its any different. I want to fix the problem right before i smog it.


The plug on the IM right above the loose plug is attached to the same wire and i didn't know which plug is which.

 

in the second pic the iat is clearly pluged in. maybe its the wrong plug though. also on the back of the d15 intake theres a little black sesor with a vacum line. thats probably what the extra plug is for.

 

i think black0hatch is right. the plug (2nd pic) in your hand is probably for the iat. i think the plug you have plugged in is for the purge solenoid. it is usually bolted to the rear of the intake manifold. you can use your d15 one.

 

The purge solenoid is plugged in already, I just switched the plugs and now the cel is gone, thanks