Name that part!

[Sask84gt]

Hey all, had this idea for a bit now and thought I would try it out. Might be a stupid idea and if so it will disappear quick but it could also be helpful.

Seeing as I'm new to restoring cars there are a lot of parts that I don't know the name of or what they do. I can't be the only newbie to visit this site with questions like that so i figured this thread could be a place where we can post pics. More knowing members can tell us what it is and explain its function. Would help tremendously, at least in my case.

First up, whatever this is lol
Attachment 128886

[gr79]

Have similar switches on my car.
Pretty certain those are versions of manifold pressure switches, mostly 1980's era.
For some reason, info is generally pretty vague on them.
They connect to intake manifold to sense engine vacuum or pressure and translate that to control electric circuits.
Shift lights, boost/overboost lights, high altitude timing control, turbo boost control.
Similar work as engine timing control with Dura-Spark II box, yellow strain relief, 3 plugs.
Different versions of switches with color id are calibrated different.

Pics of similar:
http://vb.foureyedpride.com/showthre...um-lines/page3

Never found out part numbers, all apps, or sources for replacements other than used.

[Sask84gt]

Have similar switches on my car.
Pretty certain those are versions of manifold pressure switches, mostly 1980's era.
For some reason, info is generally pretty vague on them.
They connect to intake manifold to sense engine vacuum or pressure and translate that to control electric circuits.
Shift lights, boost/overboost lights, high altitude timing control, turbo boost control.
Similar work as engine timing control with Dura-Spark II box, yellow strain relief, 3 plugs.
Different versions of switches with color id are calibrated different.

Pics of similar:
http://vb.foureyedpride.com/showthre...um-lines/page3

Never found out part numbers, all apps, or sources for replacements other than used.

Thanks for replying! Guess I should of mentioned that all parts i post will be from a 84.5 gt. So my next question was going to be is it needed,but from your description it seems pretty important?

[gr79]

A 1984 Mustang vacuum diagram should show descriptions and connections.
Other Ford models also have used these things for whatever purpose.
On my car, provide signals to the Duraspark box for timing retard, boost and overboost lights, and a warning buzzer in the dash.
These vacuum triggered sensors started to disappear when newer tech PCM's, EFI, electric sensors, took over.

[xctasy]

If its 5 Speed, its 4bbl, and it has a number of very different 5.0 Carb VECI diagrams.

Vacum control switch solenoids.

qikgts has CHB E5AE_9C485 for his 1985 Hi Altidude 4V GT

http://vb.foureyedpride.com/showthre...1985-Emissions





Passenger side firewall mounts the updated VCS's for TAB/TAD parts in that postion on some 4v's

Latter solenoids look like this

Do your solenoids look like this ?
Ford describes these as "normally open solenoids valves with vent".
When de-energized the valve should pass air.
When energized the top port is blocked off and the bottom port is vented to atmosphere.

Determine which port does what in stead of going by top or bottom.
You want the port that gets "blocked off" connected to the vacuum "source".
The port that gets vented to atmosphere connects to the "device" (the dump valve or diverter valve).

Do you have the original emissions label under the hood to go by ? Maybe Ford changed this from '83 to '85 ?
Anyway, on my '83, the thermactor system, EGR valve and charcoal canister purge systems all run off carburetor "EGR" vacuum port.
None of them are connected to manifold vacuum.

[WilliamCapri]

Here is their location on my 85.

[Sask84gt]

Ok, on the 84 location is on the passenger side tower.

[Sask84gt]

So can this be deleted? I have seen some pics of engine bays that run carb where this is not used.
Attachment 128894