Quote Originally Posted by SiRed94
detonation is commonly heard as (pinging) but with a stock engine that has 9.2:1 compression i doubt this is the problem if the ignition/fuel parts are in an even halfway decent condition... an issue with the valves (aka bent etc) you would hear a tapping and it would be missing very bad throughout the power band... improperly adjusted valves would be tapping... out of curiosity... has it been stalling out when you brake suddenly or come to a stop lately?