Thought I'd follow up on my last post. This problem seems to have fixed itself. I now think I filled up with a load or two of crappy gas. I do now notice some very minor pinging but I would think our local fuel suppliers are still pumping the lower BTU winter grade fuels.
Thanks for those who tried to help.
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Henry
2011 F150 FX4 5.0, 3.73...
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