[xjohnx]

Originally Posted by Calum

Ok, a little more explaination. I've been hearing some that sounds to me like knock, only when lifting off the throttle. It's a pretty specific situation, if I've been at the same throttle position for a little while ( a few seconds) and I lift just slightly, I get a single ping.

As for the rest of the tune, I think there's more low end. And I'm almost certain John has been playing with either emmisions or milage. Two or three time I heard the engine start doing the bear eating a hornets nest thing, but at partial throttle. There was zero change in power delivery, it was smooth, but it really took me by surprise when all of a sudden the engine is making more NVH.

Try to recreate the ping while logging and send the logs to @Visconti.