2000 expedition stumbles at full throttle from stop

i have 00 expy with 5.4 triton with 80k. bought it used a year ago. not sure whats been tuned up on it. i havent done any engine work as of yet. when i take off from stop and go hard on the gas it stumbles and seems to misfire before kicking in and speeding up. does this sound like a basic tuneup fix? or should i be considering map sensor or other? another words...where should i start? :)