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Intake manifold runner control stuck open?

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  • Intake manifold runner control stuck open?

    I pulled my codes and got "intake manifold runner control stuck open"
    Now I'm not sure what this means?...does it effect the overall performance any, best way to fix it, etc?

    Any help would be greatly appreciated

    Thanks, josh
    1998.5 Black SVTC - WRSW intake, custom ram air plumbing, magnaflow catback, platinum burner fogs, vinyl eyelids
    2004 Beige Lincoln LS-V8 Ultimate
    - Josh

  • #2
    The imrc is designed to open the secondary intake ports at around 3200 rpm, allowing more air into the system for greater power at higher rpms. At lower rpms (everyday driving), the imrc is supposed to keep the secondaries closed for greater torque and economy. Have you ever floored it at low rpms and noticed that at 3200-3400rpms, your intake gets delightfully louder?

    If the imrc is indeed keeping the secondaries open, you are losing low end performance and efficiency.

    The imrc box is located under the plastic "2.5 liter duratec" cover on the front of the engine. Pull the plastic cover off and observe the imrc and the cable extending from it----------out to the bottom of the intake.

    You should see that it is able to pull on a couple of levers, connected to a large spring, that open and close the secondaries. Have a friend rev the engine to 4000rpms while observing these levers. You should see some action. If not, make sure the levers are properly attached (the rod popped of one of the levers once on my contour).
    Or perhaps the imrc has failed, which is not uncommon. You can usually pick one up on here on the forums for a decent price. It's a pretty easy inspection.
    1998 Duratec ATX

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    • #3
      Yea I have noticed in between 3 and 4 thousand my cars gets twice as loud and I am pretty sure my car is dogging a little but until then and then you can feel it kick right around 3 to 4 grand

      Thanks, josh
      1998.5 Black SVTC - WRSW intake, custom ram air plumbing, magnaflow catback, platinum burner fogs, vinyl eyelids
      2004 Beige Lincoln LS-V8 Ultimate
      - Josh

      Comment


      • #4
        If the cables are just disconnected can I just reconnect them or do I have to buy a new part?

        And it is the silver box under the plastic cover?

        -thanks
        1998.5 Black SVTC - WRSW intake, custom ram air plumbing, magnaflow catback, platinum burner fogs, vinyl eyelids
        2004 Beige Lincoln LS-V8 Ultimate
        - Josh

        Comment


        • #5
          well i looked at it and the cable is still connected, but the spring piece it is connected to itself seems to be stuck i was just trying to follow the wire to see where it went and accidently pulled it and now the spring piece is stuck in the other dirrection so im assuming closed?
          1998.5 Black SVTC - WRSW intake, custom ram air plumbing, magnaflow catback, platinum burner fogs, vinyl eyelids
          2004 Beige Lincoln LS-V8 Ultimate
          - Josh

          Comment


          • #6
            iirc the closed possition is with the arms on the secondary linkage pointing towards the radiator. when they open the linkage is pulled towards the firewall.

            either the imrc itself is bad or you need to adjust the bracket holding the cable on the LIM. there is a good thread about this in this forum.
            - 12 Focus SE
            - 95 Mystique LS <-sold
            - 99 Contour SE Sport <- traded in 2/13
            - 99 Contour SeVT <- 3L/NPG Turbo
            - 2k Contour SVT - #2137

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            • #7
              thanks for the held guys my i replaced the imrc and now it runs perfect talk about missing low end power it almost feels like a different car now
              1998.5 Black SVTC - WRSW intake, custom ram air plumbing, magnaflow catback, platinum burner fogs, vinyl eyelids
              2004 Beige Lincoln LS-V8 Ultimate
              - Josh

              Comment

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