Well, dont any of you ever come to me for diagnostic help. I'm a complete and utter dumbazz.
After 2 weeks of screwing with my truck, compression tests etc. I did what I should have done the first day.
Removed the valvecover..........
I was 100% sure it wasnt this, but....You know what they say about when you Assume...
Yep, the rocker came off the pushrod on the exhaust side of No.6
I feel dumb as a box of rocks.
Put it back on, guess-t-mate adjustment, and it runs smooth as can be.
Im a dick
