i installed cng in my 2005 vitz but soon realized that car is not good on it so i got it removed but now the car does not have the same power that it used to hav before the installation of cng specially on ac the cars pick seems to be lazy and when i accelrate there comes a sound like ggggrrrrrrrrrr and vanishes. the sound is not too loud but u can hear it and the car also viberates when i brake the car to a stop . plz help me someone . i am really worried. if there is some good mechanic in lahore plz tell me.