Doesn't bother me, since it only happened twice in 3500 miles of driving and only when the car is totally heat soaked. Oh, and the other change was a tank of Shell gas instead of Chevon (what I normally get, from the same station).
I am hoping that the reflash will make the ECU a little smarter--don't advance to X degrees if A, B, C are true.. and then remember what the A, B, C values were!
Originally posted by shirokuma
Not really - under the right circumstances (or should that be wrong?), nearly any car will ping/knock. The problem isn't that it pinged, the problem is whether or not the ECU dealt with it correctly. It sounds like it did, if it went away. Your description of the circumstances of the ping would lead me to believe that even the best operating engine/ecu would have done exactly the same thing...