My tow rig is an '04 Super Duty with a 6.0 Powerstroke (my dad's actually, but that's a long story) I drive the truck as much as he does and baby the hell out of it. I put an EGT and boost gauge in it to monitor everything and keep it safe. We've had big problems with this truck. First off, the planetary gearset for reverse wasn't manufactured properly, allowing a pin to walk out and releasing metal shavings into a brand new transmission. Ford refused to give us a new one. They installed a new gearset, new seals, flushed it and called it good. My latest problem is that we were hunting down in Kansas, I make a left hand turn and the truck flat out kills. A 1 ton crew cab is kind of a bitch to stop or steer without power to a power brake and steering system, so I'm a little upset. I flip it in neutral, it fires back up, and we go on our merry way. I'm running the scenario through my head and the only thing I can think of is that the injectors all slammed shut simultaneously. When we get home, I go into the dealer and raise hell. (their service department sucks so that's kinda what it takes for things to get done) A mechanic overhears this and tells me it's probably the cam position sensor. I know hardly anything about the internals of this engine, but figure that it's a logical diagnosis. He went on to explain that he's seen this happen twice, the sensor fails momentarily, and since the engine can't figure out the position of it's own cam, it shuts itself off to prevent damage. I get home from work today and my dad says that the dealer called him this morning and asked: #1. Did the truck have a chip? #2. Was it left to idle for long periods? #3. Have we messed with the EGR valve? Then goes on to tell him that they're putting in a new EGR valve since the old one was completely clogged and ordering parts for the turbocharger. Just a reminder, this truck has 10,500 miles on it. The only possible explanations I can think of that would cause him to ask those questions mean BIG problems with the engine itself. I know that the impeller on the turbo isn't melted since I installed the EGT pyrometer in the exhaust manifold and keep a close eye on it. This leaves only the possibility that something ran through the turbo, metal shavings, chunks of soot, I have no idea. However, the boost levels haven't gone down at all. They're still like the day I put the probe in. I'm going in tomorrow to talk to a mechanic and see what the hell is going on, but does anyone have any good ideas? This truck cost more than the rest of our vehicles are worth, it's his business truck so he needs it to run to satellites almost every day and I need it to pull with. I hope there's something obvious I'm overlooking but I really don't think so. Sorry for the long post but if anyone has any bright ideas or similar experiences, please spill them for my sanity's sake.