Abstract: Apparatus for heating and vaporizing a liquid hydrocarbon fuel supplied to an internal combustion engine includes a housing having an inlet and an outlet. A venturi shaped inner sleeve of the apparatus is heated to promote vaporization of the liquid hydrocarbon fuel injected into the interior of the housing. Exhaust may be introduced into the interior of the housing and mixed with the vaporized and heated fuel. Further heating of the mixture can result in reformation of at least a portion thereof to a clean usable fuel prior to its introduction into an internal combustion engine.