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On My 89


That was taken after I hid all my vacuum lines 7 yrs ago,just look for the large round plastic ball in the passenger side fender behind the splash shield.

94StinkinLincoln

yea, the 3 plug vac lines are for the smog stuff, it wont hurt anything, mine is unplugged b/c i have none of it in the car. im about to rip all my a/c stuff out and just leave my heater stuff for winter yay few more hp

90lxstang

I couldn't get great pics of where most of the wires go. Although you mentioned you don't have smog so I don't think they would benefit you anyway. They are in a tight space which is hard to show in detail. Have you found a wiring diagram in a Haynes manual or something?

jeremy_04

i just had that same problem with my 95, and like the C_A said, it was the little black vaccum line along the firewall, it snapped in half, i put a rubber hose on it, and now it blows out the vents, and not the defrost

302f150

anyone know where the source comes through the firewall? thats really all i need to know now, i found some diagrams and all

silver91gt

above the heater core inlets on the firewall there is a plastic vacuum line going inside, that needs to be attached to the intake vacuum.
you dont need all the crap for vac if it doesnt have any emissions stuff on it.

I have no emissions stuff left and ran a vac hose tapped from the intake to the fpr, and a T going to the heater line.
make sure all the vac lines coming off the intake are hooked to something or are plugged off.