I appreciate any advice you guys might have. Today, I was merging onto the freeway going about 60 and was attempting to get ahead of a big rig that was in the right lane parallel with me. When I punched it the L bogged down considerably. This happens everytime I'm going around that speed. When I'm going slower (<30 mph) I can peg it with no problem. I'm guessing it's a plug issue but I'm not mechanically inclined so I just don't know. My truck is stock.

 

i'd check plugs, fuel filter, and clean MAF