Hooting noise (kinda long) - Saab Performance Bulletin Board - Saabnet.com
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Hooting noise (kinda long)
Posted by A12 (more from A12) on Mon, 30 Jul 2001 11:39:14
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I get this hooting noise when my manifold(turbo) gets to the same as ambient air pressure.I can tell because it only makes the noise when the gauge enters the broken white area.As soon as it goes into yellow(boost) it stops making the noise.Any body have similar experience? I don't think it's my hooter valve(BPV),it was replaced a little while ago.I think it's just a problem with conflicting airflow at a certain point in the induction system.Been doing this for a while now (6 months).Only mods at this point are filter and exhaust.Any ideas?
Thanks.
'91 900 turbo
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