can anyone tell me what vacuum line goes onto the three way splitter that is on the passenger side of my motor? its an 89 350 TPI, i have attached a drawing, it is labeled!

If the left part is the charcoal canister, then that should plug into, or rather fit over a nipple on, the bottom of your throttle body.

no, the right part attaches to the throttle body, the left part has one of those plastic tubes on it, and runs up to the front of the passenger vavle cover, to the big plastic thing where the heater hose, and the coolant hose off the TPI meet.

Maybe someone can jump in here and hlep me too? I know that on the tpi car's, there are two lines comming from the back of the engine compartment. One goes to the heater control valve on the passengers side. The other plastic tube, a short one, I'm not exaclty sure where it belongs? I spliced into my vacume lines for all of the accessories for my supercharger. Sorrry, i cant be of more help?

Cruise control perhaps?

I'd venture that one side of the T runs to the cruise control, the other to the heater control valve in the dash. Besides the MAP, FPR and power brakes those are the only vac lines that come off the back of my 92s plenum...

I just pulled mine apart. One side goes to the vacuum canister in front of the driver's side front wheel, the other goes to the AC control in the dash.

the top of the "T" goes to the under side of the throttlebody. One of the other ends goes to the evap cannister, the other end snakes under the plenum and back to the EGR solinoid (fwd port on my car).

ding ding ding, anyone who said that the third line went to the cruise was correct, i went and trackied it out today, and it goes right to the cruise control.

Beginning to think no 2 F bodies were plumbed the same here.

i second that, because of my other two f bodies, neither is plumbed the same (vacuum wise)

what is that actual piece connecting all 3 of those hoses called? and also while changing my ignition coil today i broke the plastic hose thats on the left side of that piece, how hard to replace and what is it called?

It is called a "T" fitting and you can buy replacement hard vacuum line at any parts store.

just to let everyone know, the missing vaccum line goes to my cruise control