Fashewar Shenhai-Hujja
Lokacin da aka kunna carbon monoxide a cikin cakuda da iska, yana iya haifar da fashewa.
Wannan ya faru ne saboda haɗuwa da CO da O2 a cikin takamaiman rabo a cikin iyakokin abubuwan fashewa-kusa da ma'aunin stoichiometric da ake buƙata don samuwar CO2.. Irin wannan haɗuwa na iya haifar da hanzari da sauri, haifar da iskar gas ɗin da aka samar don faɗaɗa cikin sauri kuma ya haifar da wani abu mai fashewa.