I am facing Starting Problem on CNG (FX) when i start after 24 Hours, but if i start on Petrol, there is no problem, but after 2 or 3 min, racing and hot up ingine, then when i start on CNG, doesnot start on CNG, so i start again on Petrol, and running 1 and half Kilometer, and then convert to CNG , then start after long self, and running smoothly all day witout any problem, i have tune my FX , such as Plug, Tabit, battery 50 A, i have purcahse 6 months before, so my machanic told that , your car coil problem,
so please give me advice or help