I've noticed several contours that make a distinct whistle at idle...mine does it, especially if it's humid out. It seems to come from the UIM somewhere, goes away when driving. Mine started after I cleaned my TB. I noticed on the TB a small hole, that was clogged with carbon. It's not anymore. Perhaps thhat is whats whistling? Minor annoyance...


1999 Silver Frost SVT #609 of 2760 Quaife, lightened SVT Flywheel, SPEC stage II clutch, removed resonator, k&n drop in - various other goodies too.