Hello, My car is n54 FBO MHD 2+ (no boost leak)
under constant throttle if you begin to climb a hill(even a slight one) the exhaust note changes to be much louder and becomes VERY droney. Since it happens only under those conditions, and happens almost every single time i think it's reacting to the increase in load rather than a mechanical issue.
If i give it just a little more throttle it immediately goes away.
i think it's either VANOS changing cam timing or WG position changing in response to increased load
what do you think??
under constant throttle if you begin to climb a hill(even a slight one) the exhaust note changes to be much louder and becomes VERY droney. Since it happens only under those conditions, and happens almost every single time i think it's reacting to the increase in load rather than a mechanical issue.
If i give it just a little more throttle it immediately goes away.
i think it's either VANOS changing cam timing or WG position changing in response to increased load
what do you think??
