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Question for you. Long round silver thing next to vacuum tree. S70 1998

posted by  flwright64 on  Sat Apr 16 20:14 CST 2011
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last visit: Wed May 14 22:16 CST 2014
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This is something I don't have the courage to unplug. It is under the black protective cover with the throttle body.

There is a rubber pipe extending out of the top of the vacuum tree. half inch in diameter. Leads to a silver round thing about 2" dia and 5" long with a connector on one end. There is a second pipe that loops around and seems to T into the air intake pipe at the throttle body.

What's that thing? Has an electrical connector on it.


BTW. The half-inch diameter pipes seemed in good shape on this 1998.








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    Question for you. Long round silver thing next to vacuum tree. S70 1998

    posted by  tmannian on  Sat Apr 16 20:15 CST 2011
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    last visit: Sat Sep 20 10:31 CST 2014
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    that is your idle air valve.
    --
    If you're not driving it "like its stolen," are you really driving?








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      Question for you. Long round silver thing next to vacuum tree. S70 1998

      posted by  flwright64 on  Sun Apr 17 00:14 CST 2011
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      Yep. Plug that into Google and that's what I'm looking at.

      I regret questioning if these cars had them. Now it makes sense.


      Anyone see one fail?

      The rubber hoses look like they have a year or two or three left on them.







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        Question for you. Long round silver thing next to vacuum tree. S70 1998

        posted by  tmannian on  Sun Apr 17 07:26 CST 2011
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        last visit: Sat Sep 20 10:31 CST 2014
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        Define fail. If its stop working completely, that's not too common, these things are robust suckers. Usually its just that they gunk up so much that they are barely doing their job. Pull it off and spray some brake or throttle body cleaner in it a few times and get a lot of it out. When its working it makes an audible humming sound, similar to what the power steering pump puts out.
        --
        If you're not driving it "like its stolen," are you really driving?








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          Question for you. Long round silver thing next to vacuum tree. S70 1998

          posted by  flwright64 on  Sun Apr 17 12:07 CST 2011
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          Many thanks. I hope its part of scheduled maintenance at the dealer.

          RPM seems to vary at idle correctly and if it was sticking or slow, the engine should stall out more often than once. B-)

          I mistakenly assumed this function was taken care of by modulating the fuel injectors or spark timing.







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            Question for you. Long round silver thing next to vacuum tree. S70 1998

            posted by  KlausC on  Sun Apr 17 16:39 CST 2011
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            last visit: Fri Oct 24 10:15 CST 2014
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            The IAC motor is NEVER serviced at the dealer. That is how reliable they are. But, after 105K miles they do get a lot of carbon build up and a good soaking with throttle body cleaner and a toothbrush makes a world of difference.

            Klaus
            --
            Always willing to listen, just not able to take direction.







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