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Help! mystery plug (93 850, non turbo) 850 1993

posted by  Shaughnessy on  Sun Feb 22 17:01 CST 2015
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last visit: Fri Oct 3 23:53 CST 2014
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I'm in the (slow) process of putting my engine back together, and even though I documented things, I seem to have found a mysterious plug that I'm not sure where it goes into.

The plug is located under the intake manifold, but is not the one for the Idle Control Valve or Throttle body switch.


It's almost right on top of the starter, but I don't think it goes to the starter. And it doesn't reach any other obvious plugs that I can see.
--
1985 245. 246K Gone..but not forgotten.








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    Help! mystery plug (93 850, non turbo) 850 1993

    posted by  Shaughnessy on  Sun Feb 22 17:49 CST 2015
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    last visit: Fri Oct 3 23:53 CST 2014
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    Figured it out. It was the (I believe) knock sensor by the PCV oil breather doohicky. Or whatever that box is called below the intake and thermostat.

    I'm getting good at taking the intake manifold off though. Was smart this time and DIDN'T have to unbolt the dipstick and lower bracket (because I wanted to save that until I knew for sure I was done taking the intake manifold off)
    --
    1985 245. 246K Gone..but not forgotten.








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      Help! mystery plug (93 850, non turbo) 850 1993

      posted by  someone claiming to be dg on  Mon Feb 23 05:31 CST 2015 [RELATED]

      hopefully you put on a new oil trap while you had the manifold off. other than the knock sensors, there is a plug for manifold air temp.....check online wiring diagrams for what goes where for the 93. how much to have the head rebuilt?








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    Help! mystery plug (93 850, non turbo) 850 1993

    posted by  Shaughnessy on  Sun Feb 22 17:13 CST 2015
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    last visit: Fri Oct 3 23:53 CST 2014
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    thinking outloud...could it be the knock sensor? Although I think I see that one, and it has a plug in it already.

    Must be something close to the PCV oil breather box thing.
    --
    1985 245. 246K Gone..but not forgotten.







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