Engine growling sound

hubertphilion

New member
Joined
Feb 10, 2024
Location
Quebec
TDI
Q5 2015
Hello
I have a Q5 tdi 2015. 340000km always maintained extremely well. Does not burn oil. Does not leak. No exhaust leak.
i have notice lately (Mabey 3-4 months) that during normal acceleration, the engine sound changed. It’s kind of a «loader or stronger » diesel engine sound. Cruising sound is good, idling is good, it’s just in acceleration (normal acceleration) from 0 to 70-80 km/hour that I hear this new sound. Higher speeds the wind /road noise buffers it. To me it sounds like Mabey injection timing could be a little off or something like that. It is very constant and always present.

Any ideas?
 
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