Hey everyone,

Been a long time. Used to be a 6.0 owner so I was here a lot.. been a lot less since I upgraded but I'm here with a question.

I have a 2015 6.7 that hasnt really had a problem per se, but more something that caught my eye and foot.

Very consistently while driving shortly after starting up (Let's say around 70f). The truck noticeably cuts on power and raises boost. I'd say during normal cruise at 55mph im usually at 2-3lbs. But when this happens, im more around 10lbs. Any medium to high throttle will shoot it straight to 30lbs. It still has plenty of power with no loss that I can notice on the top end, just that initial feeling of loss when it happens.

Now, also just as consistently when the truck opens the thermostats and is fully warmed up, this power loss will reverse itself and the boost will settle back down to how it is supposed to be. This has been going on for 1yr +

The truck is deleted and tuned, EGR system only unplugged for now. Happens throughout all of my tunes so im not sure if thats a culprit.. heck im not even sure if this is an issue at all or maybe just a warm up sequence.

No other problems with the truck, just curious as to if anyone has input.


Thanks!

 

look to your tuner and consult with them.

I take it you scanned the pcm and did not have any codes or check engine light either.

 

I would not assume that the sensors which are providing you with number are any good.

Have you validated your sensors are ok?

 

Have you found out any more information on this issue? My truck, also a 2015, has done the same thing for 2+ years. Deleted, coopers custom solutions tune, bdx tuner.
Have tried new map sensor and back pressure sensor. Everything looks good in forscan, except the turbo vanes are definitely closing up a bit when this is happening. Comes out of it after about 10-15 mins. Maybe not an issue, but more of an annoyance.