When ever i get on my truck (foot to the floor) the motor stumbles/studers between 3,000 and 4,000 rpm almost sounds like its missing or back popping? after it gets past 4,000 rpm it seams OK.
truck has 52,000 miles on it 5.4, auto trans.
so any ideas what might be causing this?
spark plugs? clogged cat? i put a air filter in a few months ago when i changed the oil.
it'll throw a check engine light every now and then but its never on for more then a minute before it goes off, i've had it scanned twice with no codes.