Welcome to the chapter!
Originally Posted by
tojoski
He's got a question over in the 6.0 forum if anybody can help out...
Ain't exactly running a stock truck is he?
If he's deleted the EGR cooler and head-studded, I'd agree that the cap is suspect. It's possible a head gasket is going/gone south. If the studs weren't installed properly...it has happened to a couple of guys.