SOLVED.....Had a broken spark plug. Replaced all plugs and wirers and it's running great again. Thanks for the suggestions!
Could it be the DPFE sensor?
I can't believe I have the only truck with these symptoms.
Can't figure out why it stutters between 35 and 55 mph. It accelerates great and runs down the hyw at 70 mph smoothly. I've replaced just about...
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