Abstract: The air and fuel induction passage of a combustion engine is provided with air filtering structure for filtering the air entering the induction passage and fuel inlet structure for admitting fuel into the induction passage downstream from the air filtering structure. A foraminous panel constructed of conductive material is insulatively supported from the air filtering structure and disposed for passage of at least substantially all of the air moving through the air filtering structure through the foraminous panel. The fuel inlet structure includes at least a portion thereof constructed of conductive material and a source of high voltage, low amperage current is electrically connected, to the foraminous panel on one side and to the conductive portion of the fuel inlet structure on the other side.