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Yeah,I was thinking possible coil/dist issue as well.Was going to do a spark test.Was wondering if maybe clogged CAT? CAT is smelling really bad,truck only has 150,000 miles. Also,I recently had PCM replaced due to an issue.Was just wondering as far as the timing in general,truck seems to run a bit weaker and sluggish with the new PCM as well as the MPG has dropped drastically. With old PCM,engine had been running in failure management mode and didn't know if previous owner had messed up timing or what.
Thanks
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