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Idle Stop Solenoid Question

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  • Idle Stop Solenoid Question

    I energized my idle stop solenoid, it works just fine but how in the world is it supposed to make contact with throttle contact? I see the adjustment bolt and where the solenoid arm makes contact but I would have to crank the adjustment screw on the idle stop bracket all the way (towards firewall side) to be in the range of adjustment which calls for a 5/16 gap with plunger pushed in. This would completely crush/compress tension spring on idle stop which makes no sense. Anyone else encounter this? Thanks
    James

    '88 GW Sterling Silver Metallic
    Previously 1987 GW

  • #2
    I have never bothered with them.
    Easy to remove and just use throttle stop screw on base of carb.

    The manual tells how to adjust one if it even works properly after 35yrs.
    Tony
    88 GW, 67 J3000, 07 Magnum SRT8

    Comment


    • #3
      Originally posted by babywag
      I have never bothered with them.
      Easy to remove and just use throttle stop screw on base of carb.

      The manual tells how to adjust one if it even works properly after 35yrs.
      Yep, that I understand and the adjustment is straight forward but why is the distance that I have between the plunger arm and stop so far off? Again, I would have to crank the adjuster deep into the spring to even get within range - normally manufacturers keep the adjuster in the mid range to allow for plenty of travel. As these GWs keep increasing in value, I stick to oem so that should I sell it one day, I can claim that everything works and is adjusted accordingly.
      James

      '88 GW Sterling Silver Metallic
      Previously 1987 GW

      Comment


      • #4
        Ahaa!

        I think that my solenoid should be the type that has the threads on the actual solenoid valve facing towards the front of GW which would allow for locating the valve closer to throttle stop. The style I have I believe to be incorrect for my carburetor or someone tried to replace oem original solenoid with what they were told is correct for an '88 GW -mysteries abound with this jeep. There is a lot to be said for all original unmolested vehicles . . .
        James

        '88 GW Sterling Silver Metallic
        Previously 1987 GW

        Comment


        • #5
          Photos of what yours looks like would help.


          Drop the throttle to its engine throttle stop. The idle stop solenoid lifts it (the throttle) just a bit.


          This is with the throttle held open on the fast idle cam as will be typical when working cold.
          Last edited by nograin; 12-06-2022, 01:02 PM.
          '85 Grand Wagoneer
          360 727auto, NP229
          body by beer (PO)
          carries wood inside
          no "wood" outside
          My other car is a fish

          Comment


          • #6
            Originally posted by nograin
            Photos of what yours looks like would help.


            Drop the throttle to its engine throttle stop. The idle stop solenoid lifts it (the throttle) just a bit.


            This is with the throttle held open on the fast idle cam as will be typical when working cold.

            Thanks, will get a pic up but mine, set pretty much where yours is has no chance of making contact -weird!
            James

            '88 GW Sterling Silver Metallic
            Previously 1987 GW

            Comment


            • #7
              Realize that these solenoids can be there for at least two different purposes.

              First, they could be an idle stop that pulls back at shutdown. This closes the throttle completely when the ignition is off, and prevents run-on (dieseling).

              Or, it could be there to boost the idle speed under higher load. Typically this is when you turn the AC on, although I imagine there are other uses.

              From the '89 TSM, it would seem this second point is the objective here. Look at page 14-175 figure 49. There is a very clear line drawing. The TSM will tell you a lot if you study it.
              Last edited by tgreese; 12-08-2022, 10:07 AM.
              Tim Reese
              Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
              Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
              Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
              GTI without the badges: '95 VW Golf Sport 2000cc 2D
              ECO Green: '15 FCA Jeep Cherokee KL Trailhawk

              Comment


              • #8
                Thanks Tim! Trying to find a good CD TSM for the '88 as I find I can navigate quicker and print out sections as needed when working on the GW.
                James

                '88 GW Sterling Silver Metallic
                Previously 1987 GW

                Comment


                • #9
                  Yea. That's where having year specific info is needed.
                  In '85 its simply an idle stop solenoid.
                  There are versions that increase idle speed with the A/C on. Maybe that was done with the SJ's when they changed to the Sanden compressors?
                  '85 Grand Wagoneer
                  360 727auto, NP229
                  body by beer (PO)
                  carries wood inside
                  no "wood" outside
                  My other car is a fish

                  Comment

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