When was the last time you changed your air filter?? Also if it is a raspy sound that is the engine trying to breathe more air.

My filter had not been changed for 2 years, and I changed it and it went away. Also do you have an CAI?

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Pure, Ebony, PWR, CNV.PKG, CD-MP3, XM, #4769 10/DEC/05
Mods: Calipers*Shaved*Caps*Chromies*Rear Fascia*GM-CAI*Eibach Sportline*Borla Exhaust*Headers*RazziWing*Lthr Visors*Eng Cover
Future: ECM*19's & 20's*Eibach Stabilizers*Chrome Grille
1984 Blk Porsche 928S 196k
my PURE Pics upDated 28/Aug/06