When I am pulling a hill I can hear my turbo boost going up then down that's about the only way I can put it I got 5inch exhaust and can hear it pretty good and it does only when pulling steep hills or a load anyone know what cause this?04.5 cummins
Hard to say with no gauges. Could be a fuel issue. If it's not getting fuel, boost will suffer. Maybe someone else will have some more helpful input but with no gauges I don't know where to point you....
Im going to think more simple here. On my Mega I can hear the turbo spool up then down slightly because the engine is defueling. Assuming you have stock programming and stock turbo that may be what you hear (which is normal). Unless its a significant change in turbo sound youre hearing then, yes there may be an issue.
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