Plugs were gapped correctly. The old ones were not dirty or oil covered. The timing chain has been replaced, but I don't remember exactly how long ago, maybe a year, but not that many miles have been driven in that time. There are no codes showing. I
used the truck for errands until about 8 weeks ago when I went back to work. I drive now 50 miles a day 3 days a week.
Thanks for your help.