I'll try posting this here..... My 07 5.9 is louder at idle all of a sudden. I cranked it up one afternoon and it had a dead cylinder,,it took about 1 minute for it to clear up and then seemed to be OK...I figured no big deal. Several day's ( and a tank or two different fuel ) I noticed the engine was louder at idle and has a noticeable fuel knock (injector ??) while accelerating up thru the gears, The fuel knock is pretty consistant under light throttle, but when I shift to 5-6 gear or step down hard on the throttle,, the knock goes away and the engine pulls hard like normal... It feels and sounds like the computer changes something at about half throttle or when the turbo begins to produce boost...the change is that noticeable..under light throttle while driving highway speed it rattles bad,, but as I step on the throttle (just a little ) it quits just as the turbo starts to whine... Took it to the stealership,,they claim they "can't reproduce customers complaint" and said there is nothing wrong...no fuel in the oil,,,,blah blah,blah...wanted to sell me an injector cleaning for $99.99.. any ideas or thoughts ??? another question... Under light or no throttle is the wastegate open or closed ?