Asslam-o-alikum,
dear friends i am facing a strange problem since i bought coure CNG. whenever i shift my key to "ON" position first my gas indicators goes to full side and then suddenly drop to red zone. i wanna ask either this thing is normal one or i have to do some technical work. one more thing i want to mention here that my car is giving 92 km on full cylinder with out AC in city. is that sufficent one or not?