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Old 07-13-2013, 09:59 PM   #1
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Motorcraft 2100 Vacuum Lines

I have googled this, but the MC2100 changed/added port locations throughout the years it was used. Below is the way I plan to route the vacuum lines. Please let me know if something is not correct or I totally missed a line. The color code refers to the color of vacuum cap. I tried to make this as easy to follow as possible.

Pic 1:


Pic 2:


Pic 3:


Pic 4:


Red (Pic 1)- crank case breather. I plan to use a Fram BA6592.

Black (Pic 1)- PCV valve

Blue (Pic 2)- distributor

Red with hot pink line (Pic 2)- to charcoal canister port closest to the firewall.

Black with pink dot (Pic 2, look for pink dot at the base of carb)- CTO port #1 shown in Pic 4.

Blue (Pic 3)- CTO ports #2 & 3(Pic 4) should be connected with a tee and connected to this port.

Black (Pic 3)- Brake booster

Red (Pic 3)- I am not sure about this port. Does it just need a cap?

Port #4 (Pic 4)- connects to charcoal canister closest to front bumper of Jeep.

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Old 07-14-2013, 06:41 PM   #2
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Any motorcraft guys lurking around here?

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Old 07-14-2013, 07:37 PM   #3
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Here is what you need to do:
The black cap goes to your brake booster hose- you need to hook that up.
The EGR doesn't need the vacuum tube blocked off but you can leave it if you want.
Leave the one on the other tube coming off the intake manifold. I use that when I hook up a vacuum gauge since it is Manifold vaccum. (Red pic 3)

Pic 4: Take a vacuum hose and route 1 to 3, and 4 to 2.

Red Pic 2: - route into your fuel filter vent hose with a Y, it is the fuel bowl vent, and will send vapors back to the tank.

Make sure that your PCV, crank breather, and distributor are connnected to PORTED vacuum. Otherwise you will create a vacuum leak.

Also, there should be a threaded part on your electric choke, you should be able to plug or cap that off too.
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Old 07-15-2013, 09:40 AM   #4
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Thanks for the response. UPS should deliver my exhaust manifold today and I can get started putting it all back together. I started it up with the MC2100 and the initial setting was rich . I had black smoke puffing from the the manifold. It was also running rough like I had the vacuum hooked up wrong. Hopefully this will get it back on the road.
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Old 07-15-2013, 12:02 PM   #5
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Do you have it all figured out now?
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Old 07-15-2013, 12:49 PM   #6
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I think so. I won't know for sure until I get it all back together. I noticed the driver's side motor mount was shot so I am replacing that also while everything is out of the way. UPS is also taking their sweet time delivering my parts. I hope I can have it running smooth by the end of the week.
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Old 07-15-2013, 07:00 PM   #7
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Your local O'Reilly stocks our motor mounts. $17.99e/a. I just did mine Saturday.

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