i am doin mpfi everything seems to be fine right now but the sensor to the far right to the tb what is it? i cant remember but i think it was blk/y an b but on my harness it was blk/y b/y or somethin like that i fig it was the only plug left to i wired it to there am i right? it snot the tps sensor, or the evac sensor it's the last one on the right if your lookin at the si intake. Also how do you post a pic , because i have one but didnt know how to post?

 

EACV - next to throttle body - 2 wire connector - black/yellow & blue/yellow
Fast Idle Control Valve on driver's side end of Si intake manifold (only on 89-91, not 88) - valve was added in 89 to increase idle when ambient air temperature is below -10C (14F) - other than that, it does nothing - no connector on DX harness for this valve - valve not required - just plug vacuum lines and forget it - you should have one connector left over which was for the DX tandem control valve - 2 wires, orange & black/yellow - this connector is not used on the Si - just leave it unconnected, tape it back to harness