Originally Posted by cgocifer
This is really difficult to diagnose without actually hearing it. My car makes a flutter, but I've heard a few other xfires that sound the same way. Its resonance. Yours seems to be something much different though. Take it to the dealership and insist someone ride with you.
I agree, this would be a tough one to nail down. Although it almost sounds like it maybe emissions related with a vacumn leak
I'd take it to the dealer, but as in most cases it probably won't make a darn sound when you get there !
