@omersiddiqui5482 bhai,
@taimurahmed92 bhai,
please help me i have spend a lot of money to rectify the fault,
why lancer having back fire on cng , i have changed, plug wires, ignition coils, spark plugs, throttle, still back firing and a bit underpower of 1st and 2nd gear, afterwards, it will work perfect. and sometimes while i was using on AC , Its feel car is taking on and off cng,