PROBLEM SOLVED!!!!!!!!!!!!!!!! Got new plus last week at 90K and the stumble, hesitation, missfire is gone. To think the ******* dealer and myself threw coils and a fuel pump at this makes me sick. However, I'm glad my truck will now smoothly spin the engine and accelerate past 3,000 RPM. It was just the plugs all along. My miss started at about 60,000 miles and just got worse with time. Doesn't look like they are lasting 100K miles to me. Never had a low speed miss, only at 3,000 RPM and above. Lucklily, I had a local, honest guy change the plugs, he broke a few but only charged me $350. I'm thankful and appreciative it's fixed. Hope this helps.