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Vacuum Hose Diagrams


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Attached are vacuum hose diagrams for our cars. Hopefully all of the configurations are here.

1971 Mustang Vacuum Hose Diagrams.pdf

1972 Mustang Vacuum Hose Diagrams-V2.pdf

 

1973 Mustang Vacuum Hose Diagrams V2.pdf

1971 Mustang A.C. Vacuum.pdf

Edited by Don C
Added a couple of diagrams to 1972

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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  • 2 months later...

What about vacuum hose schematics? I have Pro Products, Inc. '71 Mustang wiring diagram booklet that includes the vacuum diagram for the entire vehicle, but my car seems to have an additional vacuum line passing through the firewall. There's 2 vacuum lines that are routed through the firewall near the centerline of the car via the same sealing grommet. Then there's the single vacuum line that I found towards the passenger side, about 6" from the aforementioned grommet. No idea what this is for, but I've got it plugged for the moment.

1971 Mustang fastback: 10.3:1 C90E 408W hydroller - CDAN4 EEC-V w/EDIS8, girdled, lowered and caged

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What about vacuum hose schematics? I have Pro Products, Inc. '71 Mustang wiring diagram booklet that includes the vacuum diagram for the entire vehicle, but my car seems to have an additional vacuum line passing through the firewall. There's 2 vacuum lines that are routed through the firewall near the centerline of the car via the same sealing grommet. Then there's the single vacuum line that I found towards the passenger side, about 6" from the aforementioned grommet. No idea what this is for, but I've got it plugged for the moment.

 

What you described (two hoses in a single grommet) is connected to the heater/AC controls to operate the various vacuum motors. Chuck

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I can't find a single vacuum hose entering the passenger side of the firewall in any reference I have. I suspect that a previous owner had added some aftermarket device, like a water injection system.

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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I can't find a single vacuum hose entering the passenger side of the firewall in any reference I have. I suspect that a previous owner had added some aftermarket device, like a water injection system.

 

I'd like to think that, but it appears to be factory to me. I'll post some pics of this thing in a day or so.

1971 Mustang fastback: 10.3:1 C90E 408W hydroller - CDAN4 EEC-V w/EDIS8, girdled, lowered and caged

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  • 2 years later...

Attached are vacuum hose diagrams for our cars. Hopefully all of the configurations are here.

 

 

 

 

Thanks for those links, Don.

 

Now I have to find all those various valves in my engine bay, buy some appropriate ID rubber hose, and connect everything properly where it's not

 

I will report back..

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  • 5 months later...

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