Dear Gurus,I have honda city 2005, and i am worried for its engine ,engine is quite noisy even at speed of 110-120 , and when you try to push it more like 130km/h it will make a hell of a noise, I recetly cleaned up its thorttle , tappets, air filter, etc. but still very noisey .problem is both on CNG and Patrol , please suggest as how can we check the engine if its okay and how to reduce the voice,Also any good mechanic in Islamabad, which can look into it,MANY thanks.