release2063

Bought a 2015 2500hd 6.0 4x4 WT brand new back in 2015. Fast forward to now. It has 128,000 miles on it and it seems when it gets up to operating temp there is no power like torque management is kicked in or timing is pulled but makes a ton of noise like it is going somewhere but doesn't have any *****. Cold start it runs just like it did from day one super reliable power when you need it. What could it be? It is the WT trim package so I believe it doesn't have afm or dod. All maintenance has been done before it was needed, no check engine light is on.

FFDP

iTrader: (2)

Without viewing a data log with the required channels it's hard to say what might be happening.

Plausible that your exhaust is restriction flow at the cat converters but that's just a random thought.

cyclerage

iTrader: (60)

Sounds like clogged cats but get it checked out. You can crack pistons driving it like that if so.

00pooterSS

iTrader: (40)

I was also gonna say sounds like cats.

Feel the exhaust coming out of the pipe at idle and also have someone rev it hard and feel the exhaust coming out. Then go over to one of your other trucks and try the same thing, see if this truck feels like it's outputting a lot less air from the tail pipe.

The only other ways to test it is remove the front 02 sensors and try it, or lower the exhaust pipes from the manifolds and try it. Usually when I see clogged cats you won't even be able to rev it without it choking so driving usually isn't necessary to see if there's a difference after trying one of the above. Or obviously you could replace them and try it but if you guess wrong you're out the money.

01WS6/tamu

iTrader: (36)

Kitties are constipated gut em and it will run like brand new.

00pooterSS

iTrader: (40)

So what was it?

(why do people never update these "what do you think is wrong" threads!!???)