I have 07 Screw 4.6 XLT 11,000 mile. It got a little cooler in the morning here in Texas (mid to upper 50s) My truck backfire some and no power when I take off. Warm- no problem just when first starting and taking off. I never resolved what I call rough idle(dealer say aggressive cam ) either.

Any thoughts.

 

Are you kiding, with an 07 at 11k.
Make the dealer fix it with no excuses about cams or any other things.

Hint.......you have electronic throttle control.
Are there any codes pending even if the CEL is not on?
You are not equipped to begin even thinking about handling faults with your truck at this point.
They won't or can't do the warrenty, another dealer or the area rep is the next steps.