Honda's answer reminds me of the news report I heard on ABC radio many years ago just after the earthquake in Kobe, Japan. They were reporting on a CNN broadcaster who was interviewing an American citizen who happened to be in Kobe during the earthquake. The interviewer asked him all sorts of questions about his earthquake experience and, even for the last dumb question, the interviewer demonstrated that he wasn't listening to the interviewee. The interviewer asked him if he knew what caused the earthquake and, after an appropriate pause, the American on the spot said "A Howard Stern fart"....Originally Posted by Type R Positive
In any case, the bloke from Honda is partly wrong because pinging, the characteristic metallic sound, is the same as knocking which occurs after the spark plug has fired and is caused by a pocket of mixture exploding away from the ignition front whereas, pre-ignition is caused by a hot ignition source in the the cylinder that pre-ignites the mixture before the spark plug gets a chance to do it at the right time. Pre-ignition is not likely to occur in a fuel injected engine.
His advice that the sound is post combustion is correct but it is pinging or knocking but not pre-ignition as he said.
Both conditions can cause damage to an engine.
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