Quote Originally Posted by ReggieMar View Post
Sir new development palang po. kakapa change oil, change filter ko pa nga lang sa petron I think 700km palang natatakbo after the procedure ng vios sa petron.
my wild guess would be, your engine is pre-igniting. check ignition timing, po, and adjust if needed.
my other thought is, you need higher octane fuel, or better fuel quality.
btw, how's your fuel filter?