You check your engine or go to a Auto Shop
check fuse, then switch, then the wiring.
Nope you need to use the switch on the dash to switch tanks....
You can open the gas tank on an Infinite g37, as you would open the gas tank on any other vehicle. It is a rather simple process once you locate the switch. Pull the switch to open the tank.
Usually in a sealed tank, the switch contacts are in the tank too. The SF6 gas quenches any arcs that form when the switch contacts are opened.
Now I about to do this and I fashioned a power lead with a Push on and off switch and going to unhook the fuel line and hook the power lead to the pump and with at small hose to a gas can flip the switch and let it fill the gas can with the pump just have to find away to get to the pump it has a cover on it and yes I tried the other way and the garden hose will not go in side the tank because of a dumb check ball valve
check your fuel cut off switch, its under the right side dash.
check for a hole in gas tank. or seal on top of gas tank or hoses going and coming from tank.
it does not switch between cng and gas all the switch does is changes the dash board fuel switch to show how much gas in in your tank when you are running on CNG
check your fuel filter and fuel pump and or relay Be sure to check the inertia switch as well.
It might be in the gas tank. You'll have to remove the gas tank and switch it like that, then put it back on. in the fuel tank
Check your small user manual for replacing the battery. The gas tank has to be removed to do this.
Its is the gas tank with the fuel filter.