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High pitched noise from pass. side engine compartment S70 1999

posted by  someone claiming to be kurt on  Wed Jan 31 08:03 CST 2007 [RELATED]

Hi Brickboarders,
I have a 99 S70AWD with ~73K miles that just recently started making a high pitched whining noise when I move the ignition switch to II (not yet started). The car starts fine (although a little sluggish now that the battery is 8 yrs old) but the noise continues. The noise pitch changes depending on the electrical load (blinkers, A/C, headlights) so initially i was thinking it was the alternator...however, would it make the sound when the car is not running? I've read some of the other posts on air pumps, fuel pumps, etc but none seem to have the same symptoms.
Thanks for any insight you may have.
Konfused Kurt








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    High pitched noise from pass. side engine compartment S70 1999

    posted by  KlausC on  Wed Jan 31 08:46 CST 2007
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    Not your alternator.
    When the key is in pos II, all that should be running in the engine compartment is the idle air pump. But that hangs off the intake manifold.
    For the right side to make noise, I would suspect the cabin fan. Turn the blower off and if it goes away, it is an easy replace.

    Klaus
    --
    1975 164 w/174,800mi (Sold) 1995 850T w/91,000mi, 1998 V70R w/129,000mi








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      High pitched noise from pass. side engine compartment S70 1999

      posted by  someone claiming to be kurt on  Wed Jan 31 09:38 CST 2007 [RELATED]

      Thanks for the quick reply Klaus. Upon further close inspection I think I was mistaken, it is coming from the drivers side. It sounds very close to the front and down low. There is a small box there with what looks like vacuum hoses (?) attached. I have everything turned off and it still makes the noise. The noise definitely changes when turning on/off any accessory. Have you ever heard of this idle air pump making noise when the engine isn't running?
      Kurt







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