Mine has 92k miles. I bought it used with 77k miles about 1 year ago. I've changed the plugs with no luck, used OEM Motorcraft plugs. I bought the truck with a "home-made" intake, so I took that out and installed a K&N FIPK intake. I've also re-programmed the truck with a SuperChips tune that supports the intake. Today I changed the fuel filter, and one of the COPs, but did not get a chance to test drive the truck. When I do, I'll post the results. I'm also going to see if I change the TPS later next week. I measured resistance with a meter today and found it fluctuated a bit towards each end as I turned it with a screwdriver.

Thanks for the ideas.