i have an 07 expedition, 5.4 4wd, when i have it in drive and foot on brake it will idle rough all most like a miss, thin when i take off it has a small hesitation, when at speed or at idle in park all is normal. I put in drive and held the brake pedal when I applied the gas it went to idle the gas was on the floor, I turned off the traction control and it didi the same, the next morning every thing was fine.