Originally Posted by Bill the Duck
I was going to say look up my thread "Pinging like a mofo", but it would be pretty much a repeat of what's been posted here, except for the water torture and RxP. (Sea foam and Techron were also recommended.)
I did a half-bottle of RxP in 8 gallons of gas, followed by a 200 mile spirited high rpm ride. Pinging down to original levels.
Which they all do.
Tried: OVAD, high octane gas, CCP, tune/retune/reretune/tuneagain, techron, retarding the timing...didn't do the water torture, but frequently (daily) did the Italian Tune Up. Techs at local shop swore the engine was fine.
Pinged from the day I got it until the day I traded it at 37K miles. Pinged any time I opened up the throttle hard even in the meat of the powerband.
Not sure if I just had a lemon, but that damned thing pinged like a mofo and really pissed me off when I got the "they all do that" from the dealer.