xiū / lǐ / gōng / shuō / diǎn / huǒ / xì / tǒng / yǒu / wèn / tí / kě / néng / huì / dǎo / zhì / fā / dòng / jī / nì / huǒ修理工说点火系统有问题,可能会导致发动机逆火。The mechanic said there was a problem with the ignition system that could cause the engine to backfire.