today i picked up a fellow 3rd gen cummins owner off of the side of the highway, he said his truck was running rough and was making a bad sound, sounds like it dropped a valve to me, what do you guys think, it didnt sound like fuel knock, it sounded metal to metal to me i made him shut it down and i drug it up onto the trailer and towed him to my house, i will deliver the truck to the dealership on monday morning, the truck has 59,000 miles on it, not sure if it will be denied warranty because it has a 4'' lift 35'' tires and has a boost, two pyros, and a fuel pressure guage, also has 5'' straight pipe exhaust, 
