Bonjour,
Here's my feedback on that ping noise, around 1.600 tr/min...
The car spent a couple of weeks at Nissan's, where of course, they didn't find anything obvious.
I asked for air intake collector gasket change, since I was suspecting an hot air ingestion (gasket not replaced during earlier spark plugs change)
Of course, this was out of effect (except for my wallet...)
I did a 30 minutes carbon cleaning session (Hydrogen cleaning). The ping noise almost disappeared.
i renewed for another 30 minutes ession, and pinging noise is gone...
don't know if it will last...
My two cents...
Salut
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