Guys, My stock BF XR6T was pinging, so I took car to a tuner to have it diagnosed on the dyno. Tuner looked at fuel etc...but ultimately couldn't find the cause of the pinging...(wasn't a lean issue according to tuner) So it was suggested that I custom tune it as this would give me more power and the tuner would also be able to knock some timing out at the points where the car was pinging. (not really solving the issue but working around it) Car runs much better now but when I give it a kick back it still pings... I'm at a loss as to what is causing the pinging...anyone have any suggestions on where to start looking? Assuming its not leaning out, and the boost sits on about 10psi...(custom tuned to this)... Could it be plugs?...restrictive cat?....I don't think many tuners are keen to spend the time to diagnose such a problem Any help or suggestions at all are appreciated...