Hearing what sounds like small rocks rattling in a box from the right side of the motor or maybe the exaust. Only hear it under boost. No drivability issues or codes. Looking for ideas or anyone with similar issue.
Detonation! Is your car running okay? Power down? Have you recently had it tuned? Check your plugs and detonation will look like tiny specs on your plugs. Don't keep getting on it till you get it figured out.
*Edit* Found this video where you can hear it the best. Does it sound like this?
Car has not had a tune change or anything performance wise done since last tune. Maybe a bad tank of gas? I use 91 chevron only (93 is nowhere to be found in elk grove) Power did seam down both times I went into boost. I will pull out a few plugs and see how they look. Thanks for the ideas!