what wrong with my truck
i have a 06 6.0 with 10,000 miles stock prefromace wise other than no cat. i havent driven it in about a week but yesterday i was driving and crusing about 60 mph and got on it alittle and nothing no topend power no drop down a grear it just creeps up to about 80 and stops even if the pedal is on the floor. i no this is not the norm. it still has all the lowend balls that it always has had. airfilter is clean and oil has been changed. what wrong with the truck?