Ok I have a little problem with my truck, It has the 6.0 gas motor with 138k on the truck. It has been running great for the 2 years I have owned it and I drive it gently and change oil a-lot. The other day I ran it through a car wash ( auto type ) and pulled out and immediately it started misfiring bad. I took it to a local dealer and they are saying cylinders 3 and 5 are missing. they claim it needs cam and lifters? at 4400 bucks I am not taking there word for it. It is getting looked and by another smaller shop for a second opinion. anyone experience anything like this?

 

If you weren't having issues before the car wash I'd definitely be suspicious.