New sounds with K&N air filter - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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New sounds with K&N air filter
Posted by Geoff (more from Geoff) on Thu, 23 Jun 2005 13:25:45
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Since putting the K&N in my '02 9-3SE, I have been hearing a noise, musically a falling-pitch sound, for a half-second or so just after I lift the throttle. It could be rushing air, but it also has a distinct metallic quality. I think might be the BPV dumping pressure into the intake piping or maybe its the sound of the turbo rotor coasting down. I don't hear the same sound in my '96 900SET with a K&N and the flared port tube airbox mod. (I do hear a faint rushing air sound when *on* boost in that car, though.)
After a semi-successful rattle hunt last weekend, I have the 9-3SE fairly quiet (for a 3-yr-old hatchback with folding seats anyway), so I'm probably going to go back to the stock filter to get rid of the annoying sound. Just wondered if others have heard something like it, and what it might be.
/Geoff
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