I have a 1999 Ford f550 Western Hauler. chiped and dipped before I got it, also has a Gear Vender overdrive. I have never had ANY issues with this truck! I have owned it for eight years and it has had excellent maintenance. It has 125000 miles...Yesterday I came off the freeway and noticed my truck was missing...hadn't noticed a loss of power before exiting , but when I stopped WOW....... I have a top end noise, a dead miss, and positive internal block pressure. It did not overheat and still has good oil pressure. I pulled the oil filler cap and it puffs pressue. a little smoke out the exhaust but no oil!!! What happened???

 

Sounds like an intake valve stuck open or an injector pushed up out of the head.

 

that sounds pretty valid idea to me man especially the explaination of the exhaust

 

there is no oil splash under the hood so i would assume the air intake valve would be a good guess. will that requie a head removal or is that somnething i can repair by just pulling the valve cover?

 

I'm guessing a cracked piston... time to run a contribution test to narrow it down to the correct cylinder and go from there...