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  1. #1
    FEP Power Member fgross2006's Avatar
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    Default correct vacuum set up for dual snorkel air cleaner vacuum motors

    If I am not mistaken the dual snorkel air cleaner vacuum motors should have vacuum pulling the trap doors shut at cold startup/ high idle to allow hot air from the exhaust manifold/headers to drift up into the air cleaner/intake to help warm the car up. After reaching operating temp the vacuum should release, opening the trap doors so cold air can be sucked into the intake.

    Mine are closed when the car is at operating temp restricting air flow when driving. The system is controlled by the TVS valve and the air cleaner temp sensor like these. I put NOS parts in last summer.

    http://www.ebay.com/itm/281734155012...%3AMEBIDX%3AIT

    http://www.ebay.com/itm/182169675274...%3AMEBIDX%3AIT

    I looked at my vacuum diagram under the hood and its hard to tell which side of the TVS valve is left or right since its round and can be installed any which way.

    Can anyone show a diagram or specifically tell me which way to run the vacuum lines on the air cleaner? For now I pulled the 2 lines and plugged them since warming up isn't a big concern in Springtime but I do want to correct this. I feel a big power difference since I released vacuum on those vacuum motors.

  2. #2

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    fgross,

    I'm currently refurbing my air cleaner. See if these pics help.





    I can also post a copy of the air cleaner diagram page from the shop manual if needed and allowed.

    - Thomas
    Last edited by 85MUSTANGTGT; 07-08-2017 at 09:49 PM. Reason: fix photos

  3. #3
    FEP Power Member fgross2006's Avatar
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    Quote Originally Posted by 85MUSTANGTGT View Post
    fgross,

    I'm currently refurbing my air cleaner. See if these pics help.





    I can also post a copy of the air cleaner diagram page from the shop manual if needed and allowed.

    - Thomas
    Ill pull mine off tomorrow and compare. Thanks

  4. #4
    FEP Super Member xctasy's Avatar
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    Default

    85MUSTANGTGT


    Way to go.

    1 A/CL: according to Ford, that IS the air cleaner
    2 A/CL DV: Air Cleaner Duct & Valve
    3 A/CL BI MET: Air Cleaner Bi-Metallic Valve
    4 A/CL CWM: Air Cleaner Cold Weather Modulator



    yeah, the A/CL CWM (Air Cleaner Temperature Sensor) goes to the back.

    A/C Bi Mat = Air Cleaner Vacuum Control TVS Valve, and tees to left and right Hand A/CL DV: Air Cleaner Duct & Valve


    Ok, it varies every year for the 17 inch external diameter twin snorkle.

    , from 5.0 / 5.8 / 6.1 truck,
    to 460 to 5.0 GT/RS 83-s to 85's,
    depending on CFI or 4-bbl 4180c/4190xx.

    Extra puple fittings, and other stuff make it hard for 4v installs, CFI makes it easy. .

    CFI doesn't have BV, bowel vent.

    For CFI has a second CWM is for the air pump system.

    On the diagram, top left, the two DV (delay valves ) are the two motors, the green valve goes to the red line on the smaller diagram below the Big Black and White one.

    VECI 1984 or 1985 CMK will do.

    1 A/CL: according to Ford, that IS the air cleaner
    2 A/CL DV: Air Cleaner Duct & Valve
    3 A/CL BI MET: Air Cleaner Bi-Metallic Valve
    4 A/CL CWM: Air Cleaner Cold Weather Modulator





    Quote Originally Posted by xctasy View Post
    https://lmr.com/item/OS-DF1315/1984-...Emission-Decal

    The early CFI HO 5.0 one.




    Or the 85 CMK one which is a little different (has one CWM, not two)

    Zoom your eyes back and forth from the colors in the CMK diagram.

    Color Codes to do Vacuum Diagram

    Red = Main vacuum
    Green = EGR function
    Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex)
    YellowYellow = Distributor advance
    White = EGR vacuum (source)
    Black = Mainly used for the Evaporative emissions control
    Black = Thermactor ACV or Diverter valve
    Blue = Throttle Kicker control
    Pink = Thermactor Air Bypass Valve (BPV)







    Your 84.5 or 85 CFI underhood VECI is best, but the terms confuse us all, fgross.

    http://vb.foureyedpride.com/showthre...-cleaner-lines


    Quote Originally Posted by JACook View Post
    That ^^^ diagram is certainly not the worst I've seen, but I don't really see where it's an easier read
    than the ones under the hoods of my '85s. And it has some… inaccuracies, the most glaring of which
    are the carburetor bowl vent solenoids labeled as canister purge solenoids (and the complete omission
    of the actual canister purge circuits).

    Autozone has a bunch of vacuum diagrams available in their tech section, but finding the correct one
    can be a chore, and many are mislabeled. I think you also need to create a user id to see them.

    For the most part, Ford did not create separate vacuum nipples for all the different things that run off
    manifold vacuum, but used tees and wyes in the hoses instead. The main exception is on the CFI cars,
    the MAP sensor gets it's own source. But generally, if something runs off manifold vacuum, one source
    is pretty much as good as another. Same for things that run off EGR vacuum, though most if not all of
    those will be on the downstream side of the EGR thermal vacuum switch.

    Just don't follow the stuff for the carb set ups, varies again, totally, but here is a great source.. .just DON'T FREEKIN COPY IT IF YOU HAVE CFI...

    http://vb.foureyedpride.com/showthre...-Q-s-Pic-Heavy
    http://vb.foureyedpride.com/showthre...ck-Air-Cleaner


    Quote Originally Posted by Wilson View Post
    This is an 83 unit that came from a 5.0 4speed car. Hope it helps.


  5. #5
    FEP Power Member fgross2006's Avatar
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    Default

    Thanks for the replies. I had gone over this setup awhile back and never changed anything so I had no reason to believe something was incorrect. After looking everything over I found the choke stove unplugged and the evap canister tube separated from the charcoal canister.

    I don't think the evap hose would have a negative impact on idle speed but the unplugged choke stove definitely does. I had been working on that side of the engine compartment last week to set up an engine compartment light. I must had nudged the choke wire accidentally.

    Idle speed is back to normal now and the snorkel motor doors are no longer engaged with vacuum.

    CFI runs great when all is 100% correct. but just 1 small item out of whack and the car runs like poop.

  6. #6

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    Glad you got it figured out. Usually something simple. Don't know how many times something like that has happened to me.

    - Thomas

  7. #7

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    Anybody seen that dual plastic vacuum hose coupler for sale under the air cleaner on the xctasy photo. I've never had one on my car.

  8. #8

    Default

    The coupler is Ford P/N D4AZ-9E688-A. They've been obsolete for awhile, but you can still find them.
    They do tend to break off at the vacuum nipple, but if that happens, it can be repaired using a short
    length of ~1/8" thinwall brass tubing as a sleeve.
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    2012 F150 S-Crew 4x4 5.0 "Blue Coyote"... 65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ...
    '68 Vert, Mexican block 307 4-speed... '71 Datsun 510 ...
    And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  9. #9
    FEP Super Member xctasy's Avatar
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    Default

    Cheeep Cheeep knockoffs are able to be made by STL file.

    Guy's here supply 3D vacuum fittings like the 84 onwards Vacuum tree.

    86capri50, n20capri,

    http://vb.foureyedpride.com/showthre...nter-Car-Parts
    Quote Originally Posted by n20capri View Post
    I've been designing and printing RC car parts for a year now using shapeways! It's awesome. Working on some custom cars stuff at the moment too. Would love to start making replacement parts though for sure.
    https://www.shapeways.com/shops/MikesStuff

    Here are some of the things I've made
    Wing Mount

    Attachment 92013

    Front control arms

    Attachment 92014

    Rear control arms and stainless steel dogbones! (middle set of parts)

    Attachment 92015

    I did an SVO wing support too!

    Attachment 92016

    GoPro extension for the roll bar mount!!

    Attachment 92017

    GoPro belt mount



    It's pretty neat doing this stuff!!


    Age based embrittlement is common, and its a health and safety issue in operation in some parts.

    I'm dealing with the same issue for non spec plastic for repro Carter YFA carbs.

    http://vb.foureyedpride.com/showthre...e-vacuum-lines

    You can have D4AZ-9E688-A programmed and re constructed in most materials. I love Dupont, its a great plastic, but expensive and patented.

    http://forums.reprap.org/read.php?1,65051,201675

  10. #10

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    Hi. Where does the vacuum line connect to the manifold at? Thank you

  11. #11

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    Hi! Sorry trying to figure out how to use this site. The vacuum line that comes from under the air filter housing. Where does that connect to on the manifold?

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