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94 850 cold idle problem 850 1994

posted by  vincent50 on  Tue Aug 23 18:42 CST 2011
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last visit: Fri Jan 31 17:46 CST 2014
[RELATED]

Yes, I know the car does not have a choke, 230,000 miles or so, and the car is acting like it has no "choke" when started.

The car is acting just like a car did back in the days of stuck chokes. In nice warm weather, it starts right up but has a bit of a rough idle, as if the choke is not engaged. Bit of throttle play, drive off and when warm it behaves perfectly.

Now that the weather is getting a bit cooler, it starts, but the "throttle play" is much more necessary as the car wants to die. VERY low idle...

Again, drive it a bit, it warms up, no issues.

So, my question is: What is the "part" or "whatever" that handles cold idle speed or enrichment? It seems that there has to be something that "tells" the FI system to run a higher idle until warm?

Hope somebody can help!

Steve








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    94 850 cold idle problem 850 1994

    posted by  KlausC on  Wed Aug 24 15:15 CST 2011
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    Wnen was the last time you cleaned the throttle body? Things get pretty dirty and can choke up the air supply.

    Klaus
    --
    1967 220 belonging to C.A. lives on








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    94 850 cold idle problem 850 1994

    uid 5322's pic
    posted by  alschnertz on  Wed Aug 24 04:59 CST 2011
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    last visit: Fri Oct 24 10:32 CST 2014
    [RELATED]

    I'd start by cleaning the Idle Control Unit. It may be gunked-up after 230K.
    I'd also clean the MAF sensor.
    This assumes that all regular maintenance items have been addressed. In other words, you don't have spark plugs, air filter etc. that have never been changed.








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    94 850 cold idle problem 850 1994

    posted by  Tapsa on  Wed Aug 24 00:52 CST 2011
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    last visit: Sun Oct 19 13:29 CST 2014
    [RELATED]

    Hi,
    first read the codes if any then check
    coolant temp sensor
    idle air control unit: humming, contacts
    MAF connector contacts
    and of course all vacum tubes for cracks or loose ends
    br tapsa
    2x850-94,v70d5qwd-06








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      94 850 cold idle problem 850 1994

      posted by  vincent50 on  Wed Oct 19 09:30 CST 2011
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      last visit: Fri Jan 31 17:46 CST 2014
      [RELATED]

      Thanks everyone, the ICV seems to have been the problem, back to normal...

      Well, normal for 230,000 miles!

      Appreciate all the help...!







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