Abstract: Fuel apparatus including a housing portion, a fuel treating portion, a fuel metering portion and a flow control portion; the housing portion including a main chamber, an upper expansion chamber and first and second lower expansion chambers, the main chamber including an inlet connectable to an exhaust gas source of an internal combustion engine, an outlet for venting the exhaust gas to the atmosphere; the fuel treating portion including first and second conduit coils disposed within the main chamber, each of the conduit coils including an inlet and an outlet, the inlet of the first coil communicating with the first lower expansion chamber and the outlet of the first coil communicating with the second lower expansion chamber, the inlet of the second coil communicating with the second lower expansion chamber and the outlet of the second coil communicating with the upper expansion chamber, inlet mechanism for delivering liquid fuel into the first lower expansion chamber, the inlet mechanism including a vacuum so