2016 6.7 powerstroke

prefab221 · Dec 22, 2020

My truck has 167,000 mi. On it. Running good until yesterday. Starting hearing a roaring noise under acceleration.kinda sounds like a big shop vac. Best I can tell it's coming from the rear of the motor. Drove it easy home and when I got there ,there was no more noise. Everything was normal. Drove it to work today(65 mi.) The noise is back. Going home today (noise still present), made a 10 min stop, and when I got going again, while accelerating hard it starting running like it never has before. Pulling like a frieght train! I'm thinking it's the turbo going down but I just don't know now. The truck is 100% stock. I've had a cel on and off for about 2 months. Any help would be appreciated! Thank you very much.

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PDT1081 · Dec 22, 2020

What code is setting the CEL?

DEEZUZ · Dec 22, 2020

Cooling fan?

prefab221 · Dec 22, 2020

PDT1081 said:
What code is setting the CEL?

I don't know yet. Should be at the dealer jan 2nd

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prefab221 · Dec 22, 2020

CTC DEEZUL said:
Cooling fan?

Would that make it run like a bat outta he'll? Engine and trans temp both at 198 +/-.

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6.7Bison · Dec 23, 2020

Did it run like a dog when it made the roaring sound? My best non professional guess would be related to turbo, intake piping, or exhaust. The CEL should tell you more. The sound could be a boost leak that opens up under higher boost pressures. The sound could be a rendition of the broken manifold stud squeal that appears under load. Either leak may have sealed up suddenly giving the impression that it runs like a bat out of hell compared to running like a dog before hand. Sudden change in feel of performance could be a problem with the vanes sticking in the vgt. Not sure that would cause a noise though. The sound could also have been the fan being stuck on but I don't think it would cause the performance change.