I have a 2016 cummins fully deleted with a 5"exhaust MBRP muffler tuned with EFI Live.
My question is that now in NC the mornings are cold and when I crank it up with the exhaust brake on, I hear the high idle kick on but I do not hear the turbo whistle?
The exhaust break still works perfectly when I let of the fuel and sounds like a fighting cat LOL but I have no turbo whistle when the truck is warming up.
Any Thoughts or is this normal?
Thanks in advance for any input.
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