Quote Originally Posted by whiteb16a View Post
Hello Tsikoters, I was wondering if someone has experienced yung tunog na parang tomotope or tunog na parang diesel when driving from a standstill. Lumalabas yung tunog at 1K rpm and below. Pag past 1K rpm na, nawawala na sya. Same thing happens din pag nagdecelerate ka from say 2K rpm, lalabas ulit yung tunog pag hit ng 1K rpm. Wala naman yung sound pag P or N, or pagka naka manual mode. Car is a loaner for my wife sa company nila and has clocked more than 55K kms na.

Baka meron mga bros sa inyo naka experience nito. Kindly shed some light. Thanks sa mga sasagot.

Cheers!
Knocking is normally caused by hot spots in your combustion chamber that ignite the air-fuel mixture before the spark plug fires. Could be the car was poorly maintained and has hot carbon deposits on the valves or cylinder heads...or you have spark plugs that have the wrong heat range. This is very bad for the engine and should be fixed ASAP by a qualified mechanic.