Guys I'm facing a problem from a month. I use my car both on cng and petrol and till last month it easily converts from petrol to cng and cng to petrol. but now the conversion from cng to petrol is stop means that when i press the button ( to convert on petrol ) car turns off and dont start again on petrol on petrol. Please tell me why I'm facing this problem. car is mehran vx 2004. plz help.