on the back of my 1990 Si Throttle body, there is some sort of censor hooked up to the back of the manifold. it's got a vaccumm hose leading to it, but i'm not sure if it's vaccumm or not. On my b16a manifold, i don't have one. this means i have an extra plug just sitting there. is this ok? anyone know what this is? i haven't been able to find out. description:

looks to be a solenoid of some sort.
silver on top, with black on the bottom.
it's on the back, driverside of the intake manifold.
there seems to be a little oil residue on the inside, too.
it's a white, 2 wire plug.

any help appreciated. thanks.

 

I had the same thing on my B18b...Im not sure if its the same, but what i did was cut the goofy looking white plug, cut off the plug that went on the B18 (which is a 2 wire also) and then just spliced my SI wires to the B18b plug, one of the wires will have a black stripe, those should match up (your ground). Ill send you a picture later today...

-Jake

 

i believe you don't have that sensor on the B16a and ZC just let the plug hang there! iSoit's not ued whe running B16a or ZC! it's a solenoid looking deal on the drivers side of the intake manifold ?

 

yeah, found out it isn't used. but, thanks. now i need help pulling the stupid ECU pins. motor is in. looks awesome. can't wait.