Thread: Grinding Noise
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Old 09-18-2022, 11:17 PM   #3

Chutzpah's Avatar
Drives: Wild Cherry LT1
Join Date: Dec 2016
Location: Massachusetts
Posts: 1,669
That would annoy the heck out of me….Just from the video, it sounds like a low rpm on throttle metal on metal vibration. Possibly the exhaust rubbing, maybe something else (although kinda hard to tell not being there) Do you have NPP? If so, I’d pulling the NPP fuse to deactivate a possibly noisy valve. If that doesn’t quiet it down, I’d be checking the rest of the exhaust and heat shields.

Good luck, mystery noises can be a PIA.
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