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My NPP exhaust does not work when the selector **** is placed in the Sport or Track mode. When I pull NO. 214 fuse, it opens. Anu odea what the problem may be?
Thanks
Have you checked the Engine Sound Management settings on the center display? If it is set to Stealth the valves will stay closed until engine demand forces them open under full load at WOT/high rpm. Engine Sound Management lets the user set permanent settings for the exhaust. You get Stealth, Sport, Touring or Track. In track the valves will be open all of the time except for the following conditions: With the M7 transmission when the Eco Drive Mode is selected, the valves will close when the engine switches to 4-cylinder operation and when running the engine at 1500 rpm or less in 5th gear. Once the rpm exceeds 1500 the valves open. With the A8 AFM is active in all drive modes so the valves will close in any Drive Mode when the engine switches to 4-cylinder operation except when the transmission is placed in manual shift mode. When in manual shift mode the valves stay open all the time. I don't know if manual mode is programmed similarly to the M7 (valves closed in 5th gear below 1500 rpm).
Here is the page out of the 2019 OM that describes Engine Sound Management. Previous OMs from 2015-2018 are the same.
