Thank you boss for your quick response. Right now the air inlet in my baleno is fitted with a card, which is blocking almost 80% of the air. If I take it out, the car doesn't even convert to CNG, so your suggestions regarding the idle speed or change of gear on high RPM don't apply. I want that card out of my car because I know it should not be there, it's just a 'jhutka' or 'jugaar' way. Actual problem is somewhere else, like I suspect the electrical system.