Is carbon monoxide a problem with diesel engines?
Usually not, although any engine, including diesel, produces CO when combustion is incomplete. Diesel (compression ignition) engines run with an excess of air and often produce less than 1200 ppm CO. When diesel fuel is burned incompletely or when overloaded and over-fueled (rich mixture), diesel engines will produce high concentrations of CO. Diesels usually pollute the air with particulates and nitrogen oxides, not CO. Is carbon monoxide a problem with LPG engines? Yes, and the same precautions against running a gasoline engine in an enclosed space should be observed with an LPG engine. Industry sources report a properly tuned LPG engine will produce from 200 to 20,000 ppm, depending on load. A difference in CO production from an engine operating on LPG and one operating on gasoline usually results from more complete combustion of the LPG because it is already a vapor. Unfortunately, most LPG engines have simple fuel delivery systems which can easily be adjusted too rich, allowing ex
