baleno actually uses a waste spark system, 2 coils and 2 plug wires, that's the basic reason for santro, baleno, lancer mid firing on cng, the current isn't passed properly,, on cng the car makes around 9 wolts where as to work properly it needs 12 wolts. Another thing when people say connect your car to a scanner to decode it, its not as simple, its decoded only when the light comes, once the lights gone the problem is rectified in the computer.
