GT40 intake vacuum lines connection

Vacuum is vacuum: it doesn't matter where you source the vacuum from. All you have to do is match the hose sizes - don't connect a big hose to a little vacuum port and expect it to work well.

The fuel pressure regulator is the only thing that shouldn't share a vacuum line with something else. That's because if the FPR diaphragm leaks, it will spread fuel throughout the vacuum lines and devices attached to it.


Vacuum line connections:
One large vacuum line from the upper front goes to the carbon canister

One large vacuum line from the rear goes to the vacuum tree.

One small line in the front feeds the Smog pump solenoid control valves on the rear of the passenger side wheel well..

One small line in the rear goes to the fuel pressure regulator.

One small line in the rear goes to the EGR suction regulator.

One large line in the rear goes to the PVC valve.

Diagram courtesy of Tmoss & Stang&2birds - Typical Vacuum Routing for a Fox stang 5.0:

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds
(website host) for help on 86-95 5.0 Mustang wiring Mustang FAQ - Engine Information 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 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 91-93 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 94-95 5.0 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/94-95_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

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

ponsai03 said:

Man that was helpful!!!!!! I will be using the one that goes to the vacuum tree, fuel press. reg, and the PCV valve. The smug pump will be deleted and so all the related hardware. Also, the EGR will be deleted.
Does the carbon canister has something to do with the smog pump? CAn I remove it?
Last, can I plug the ports in the intake that are not going to be used?
Thanks

Click to expand...

The smog pump are connected to the carbon canister. So if you are deleteing the smog pump,then just remove and label everything before you put them away ( Hoses,bracket and clamp ).
Plug every unuse port so you won't get vacuum leaks.

time only said:

The smog pump are connected to the carbon canister. So if you are deleteing the smog pump,then just remove and label everything before you put them away

Click to expand...

The smog pump is not connected in any way, shape, fashion or form to the carbon canister. The carbon canister is connected to the fuel tank. Removal of it may cause gas vapors to become apparent in the passenger compartment.

Also while the A.I.R. pump may be of limited benefit to the enviroment the charcoal canister is working 24 hours a day to help us breath better. It is stuck way down at the front of the engine compartment and doesn't hurt a thing.