Announcement

Collapse
No announcement yet.

anyone have good information on vacuum routing for 90 GM 5.0?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    anyone have good information on vacuum routing for 90 GM 5.0?

    SO I am trying to fix a problem. My wife's Grand Marq needed valve cover gaskets. The shop was too busy to get it in before she needed it.

    So, my youngest thought he would tackle it. I wound up helping him with getting the valve cover off and cleaned up. He then needed help with the upper intake. He cannot remember where the vacuum lines went. I didn't take them off so I am at a loss. Does anyone have a good diagram for the vacuum hoses? or where I can find one? My son's tried. replacing the cracked and broken plastic ones.

    Thanks
    Tim
    2000 Ford Crown Victoria
    84 Lincoln Town car signature, R.I.P
    85 Ford LTD Crown Victoria 2 door performance project
    89 Lincoln town car: RIP
    89 Crown Victoria LX 2002 USACi sound quality world champion RIP
    1990 Mercury Grand Marquis LS
    1994 Mercury Grand Marquis (sold)
    2004 Mercury Marauder. owned for a week then got screwed by the dealer

    #2
    There is a genuine Ford electrical and vacuum manual on Ebay now. Listing # 184910562548. Least expensive one I found.
    Nice to have manual.

    Comment


      #3
      Is the vacuum routing sticker on the radiator fan shroud gone?

      Ford usually color coded the hard plastic vacuum lines.

      Green = EGR
      Red = FPR and emissions solenoids
      Black = emissions solenoids, HVAC, brake booster

      The line for the MAP sensor should be a soft line.

      Any pictures of what you're dealing with?
      óJohn

      1985 Ford F-150 XLT Lariat
      1990 Mercury Grand Marquis LS (POTM March 2017 & May 2019 - gone, but not forgotten)
      1995 Mustang SVT Cobra coupe (cream puff)
      1966 Mustang coupe (restoration in-progress)

      Comment


        #4
        My 90 seems to have a lot more going on with those crummy plastic vacuum lines than my 88.

        The rubber ones are easier.
        1.) front of upper intake to carbon canister/valve
        2.) rear of upper intake to MAP (smaller line, bigger on intake end than MAP end)
        3.) rear of upper intake to PCV (big one)
        4.) top of upper intake to vacuum tree on firewall

        Here's some pictures. Not the best quality. Let me know if you need something else.
        Attached Files
        1990 Country Squire - weekend cruiser, next project
        1988 Crown Vic LTD Wagon - waiting in the wings

        GMN Box Panther History
        Box Panther Horsepower and Torque Ratings
        Box Panther Production Numbers

        Comment


          #5
          Originally posted by Giraffe View Post
          Is the vacuum routing sticker on the radiator fan shroud gone?

          Ford usually color coded the hard plastic vacuum lines.

          Green = EGR
          Red = FPR and emissions solenoids
          Black = emissions solenoids, HVAC, brake booster

          The line for the MAP sensor should be a soft line.

          Any pictures of what you're dealing with?

          I have no idea what each of those hoses go to on the fan shroud decal.

          Tim
          2000 Ford Crown Victoria
          84 Lincoln Town car signature, R.I.P
          85 Ford LTD Crown Victoria 2 door performance project
          89 Lincoln town car: RIP
          89 Crown Victoria LX 2002 USACi sound quality world champion RIP
          1990 Mercury Grand Marquis LS
          1994 Mercury Grand Marquis (sold)
          2004 Mercury Marauder. owned for a week then got screwed by the dealer

          Comment


            #6
            was able to use a diagram from repairlink. ImagePrint.pdf

            Only one thing that is doesn't show. Is were the red plastic line that runs under the throttle body from the EGR. Were that one joins the other Vacuum lines at the others behind the upper intake.

            Is there 3 vacuum ports in the back.

            the large one that goes to the vacuum log on the fire wall.

            The one at an angle towards the driver side. That goes to the fuel pressure regulator.

            The straight one between the two. goes to all the others?

            That is my dilemma right now. She runs albeit rough. Better than before.

            Tim
            2000 Ford Crown Victoria
            84 Lincoln Town car signature, R.I.P
            85 Ford LTD Crown Victoria 2 door performance project
            89 Lincoln town car: RIP
            89 Crown Victoria LX 2002 USACi sound quality world champion RIP
            1990 Mercury Grand Marquis LS
            1994 Mercury Grand Marquis (sold)
            2004 Mercury Marauder. owned for a week then got screwed by the dealer

            Comment


              #7
              So you've got two of the three down proper. AFAIK, the third vacuum line is also supposed to be a long red one that goes over to feed vacuum to the EGR, TAB, and TAD solenoids on the passenger fender.

              My Cars:
              -1964 Comet 202 (116K Miles) - Long Term Project
              -1986 Dodge D-150 Royale SE (112K Miles) - Slowly Getting Put Back Together
              -1987 Grand Marquis Colony Park LS (325K Miles) - April 2017 + September 2019 POTM Winner
              -1997 Grand Marquis LS (240K Miles) - The Daily Workhorse & March 2015 + January 2019 POTM Winner

              Comment


                #8
                Originally posted by Mainemantom View Post
                There is a genuine Ford electrical and vacuum manual on Ebay now. Listing # 184910562548. Least expensive one I found.
                Nice to have manual.
                Yeah, I picked that one. What a joke. It only shows like 4 pages of Vacuum diagrams. Nothing for under the hood.

                At least with the diagram from repairlink was helpful.

                Tim
                2000 Ford Crown Victoria
                84 Lincoln Town car signature, R.I.P
                85 Ford LTD Crown Victoria 2 door performance project
                89 Lincoln town car: RIP
                89 Crown Victoria LX 2002 USACi sound quality world champion RIP
                1990 Mercury Grand Marquis LS
                1994 Mercury Grand Marquis (sold)
                2004 Mercury Marauder. owned for a week then got screwed by the dealer

                Comment

                Working...
                X