Quote Originally Posted by jick.cejoco View Post
nejikun,
i know you are not dreaming. the noise might be detonation resulting from wrong ignition timing, carbon buildup ( causes pre ignition or combustion starts before spark plugs fire) or wrong fuel octane number. have your ignition timing verified, decarbonize your combustion chambers and use a higher octane fuel. and please give us a feedback after doing these changes or trials
jickl
Sir, I think you are correct.

I also experience this. If you step on the gas pedal you'll hear this noise until 3,000 rpm and after that it'll be gone.

I checked the engine timing at idle and it's at 10deg. Its a GA16DNE Sentra engine by the way.

Does it mean that I'm using a low octane fuel? Its rating is 95 octane.

Thanks!