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| E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm} Total Produced: 71,212 - Years Produced: 1992 to 1999 |
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Wed, Sep-15-2010, 02:29:45 AM
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#1 |
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Registered User
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Light whistling sound on 1/2 throttle?
Although It doesn't seem to affect performance It's got my mechanic perplexed (BMW shop). At half throttle I hear a light air like whistling sound which goes away at higher rpms, almost sounds like a turbo. Anyone heard of this before?
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I Design Websites 99' BMW M3 Fern Green w/ Magma Interior Fikse - AC Schnitzer - Dinan  "To be second is to be the first to lose" - Ayrton Senna |
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Wed, Sep-15-2010, 04:07:32 AM
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Resident Rabble Rouser
Join Date: Jul 2008
Age: 27
Posts: 13,139
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 Location: Charlestown NH
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do you happen to have a BBTB or perhaps the m50 manifold
other than that vacuum leak.
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Andrew: AVUS 1995  ///95 Supercharged Club |
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Wed, Sep-15-2010, 11:06:28 PM
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#3 |
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Rockin' the drop top
Join Date: Feb 2007
Posts: 200
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Location: Menlo Park, CA
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i had the same thing, it's caused by a CAI generally, unless it's a vacuum leak. smoke test that ****, if it isnt a vac leak and u have a cai that's your issue, live with it =\. my bbtb didnt add the squeak, neither did my m50.
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Wed, Sep-15-2010, 11:34:52 PM
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#4 |
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Registered User
Join Date: Feb 2009
Posts: 117
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Check your pulleys and idlers.
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Thu, Sep-16-2010, 01:19:15 AM
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#5 |
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Dr. Awesomesauce
Join Date: Aug 2007
Posts: 7,713
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Location: Boston
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I've had this noise on occasion. Like most E36 noises, it went away randomly.
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-Jeff  1999 Estoril Blue/Dove Grey M3 Coupé HID Lighting FAQ, Power rear vent windows, Bosch headlights (output), Euro cluster, Euro 3-spoke steering wheel, Autodim/HomeLink mirror, Headlight aim control, Underhood lamp |
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Thu, Sep-16-2010, 02:53:27 PM
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2012 Formula 1 Game Champion!!!
Join Date: Jun 2008
Age: 30
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It's your CAI....if you have one.
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2013 F1 Game: Quote:
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Thu, Sep-16-2010, 02:56:27 PM
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Music is like candy - you throw away all the rappers.
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Quote:
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Thu, Sep-16-2010, 10:26:33 PM
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#8 |
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Next level beats
Join Date: Mar 2010
Posts: 1,963
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if you have an intake...its likely that and normal(as mentioned)
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 drive a live axle high power car in rain, your e30 will feel like jesus.- DontRevMe |
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Thu, Sep-16-2010, 10:39:21 PM
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Registered User
Join Date: Dec 2008
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Quote:
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Fri, Sep-17-2010, 03:09:25 AM
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#10 |
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Registered User
Join Date: Apr 2010
Posts: 276
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Location: Northern South Carolina?
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I actually sort of have this sound too. But I would say its less of air-y whistle, and more of a very high pitched metallic squeaky whistle(if that makes any sense
 ).In for ideas.. |
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| 1 or 2, light, sound, throttle, whistling |
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