New to the form here, I have been trying to diagnose a miss for a while now, I have 175/30 from MPD. Sent all 8 back to be tested and they found metal shavings in them. Going to drain the oil today, under valve covers appear to be okay. No shavings there, have to check oil and going to pull the IPR. Where should I begin to look. Oil filter looks okay have to look better at it today after work. They did rebuild them but don't want to have the same problem.