Why would a 2000 Ford F150 4.6 liter lag when accelerating and vibrate?
It may be a leak in the tube that connects the MAF to the
throttle body. If the check engine light is not illuminated, it
will make the job of finding the problem a lot more difficult. it
could have a pluged fuel filter or a pluged air filter or a pluged
catilitic converter. Maybe a bad fuel pump