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International Automotive Technicians Network
Re: misfires across all cylinders but runs fine
Posted to Technical Discussion Forum on 12/16/2023

I have scoped ckp while driving and it is amazing how rough it gets (normally) on rough roads, so don't let that take you down the wrong path.

6.8l's in that era had a TSB for dampener bolt being improperly torqued causing a similar condition. Have you check... Login to read more.