Engine bucks but not all the time.
 

2012 F350 6.7 litre. Engine has just started bucking and has died a few times. New Motorcraft fuel filters, complete oil change along with air filter. 212,000 miles. No engine light. H&S Mini Max tuner on it for two years. Exhaust delete only. Truck has never missed a lick until about two weeks ago when this started. Don't wanna just "throw" money at it.

Thoughts?????

Make sure if you have a mass air flow sensor that it does not have a sort or wires rubbed together. My died turning a corner and I looked every where for the problem and my mass air sensor wires had rubbed and when they touched my truck would jump and jerk and then one day it just died in a turn.