Vaccum lines question.

[98BLKGT]

Ok so I might redo all my vaccum lines since I don't know what the previous owner did. I need some of your guys help with this.
I don't have the smog pump hooked up, no egr, no A/C, no cruise control on the car.
Wouldn't this mean that the only vaccum lines I need is the PCV, fuel pressure regulator, and brake booster? Anything else I NEED vaccum lines running to?
(BTW I have the vac diagram but I just don't think I need all those lines if I don't have the things listed above)

 

[98BLKGT]

Anyone?

 

[jrichker]

Miss connecting the A/C vacuum line and the heater, vent and defroster don't work correctly.

 

[98BLKGT]

Miss connecting the A/C vacuum line and the heater, vent and defroster don't work correctly.

Even if I don't have A/C on the car anymore?

 

[jrichker]

The vacuum controls the flapper valves that divert and control airflow.


Diagram courtesy of Tmoss & Stang&2birds

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pinout
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

 

[98BLKGT]

Interesting. Thank you. So I guess I will leave the a/c vac lines in.
So this should be my diagram?

 

[98BLKGT]

One other question. On the diagram you see the canister purge valve. It says to hook it up to the vaccum at the throttle body??? The only place I can think of is the little tube that runs to the oil filler neck.

 

[93 LX]

on the stock intake it goes to the vacuum tree under the upper intake.