The definition of a rule is  an official regulation, code of regulations or set practice. An example of a rule is that a red light means stop. An example of a rule is an employer demanding their employees arrive at 8am.
New injectors cost anywhere from $80-$120 apiece, making their replacement a somewhat pricey endeavor. There are three types of injector leaks-it can leak fuel into the manifold from the nozzle, it can leak fuel into the engine compartment from the fuel rail, and it can leak air (vacuum leak) from the manifold.
In Europe, there are conversion kits, which are fully certified, made for injector engines and cost ~ 600 Euros(~800 USD), maybe +100 USD to be bolted to the car. And you also can byu a bigger LPG tank. The one on the picture is maybe 25 â 30 lt(~ 7 gallons of LPG). Trere are options up to 4 times that.