oh boy, ok on your 94 that other port would go to the intake between the air box and the headlight. it is a preheater door that would get pulled open when the temp is cold out and it would pull air from over the header to help warm up the truck. this is a very useful thing on a carbureted motor to keep the carb from icing up, however you have fuel injection and is not a necessary item to have because fuel injection doesnt ice up, so plugging the line running from the vacuum source to the air box is the way to go and i have had mine plugged for probly 4 years now since i removed the intake before the air box and put my snorkel in.
'94 2.3L, M5OD, BW1354 manual, 4x4, 31x10.5 BFG A/Ts, 15x8 AR Chamber teflon rims, 7.5 4.10 lock-right w/disks, D44 SAS 4.10 aussie-locker, duff traction bars, electric fans, spintech muffler, duff poly body mount bushings, Lightforce RMDL140's, cobra 18wxst II, herculined floor, 375,XXX
'87 camaro 305 carbed (needs engine)
'92 subaru legacy 2.2L Turbo (needs tranny)
TRS Tech Support Staff