一辆装备了丰田3Y发动机的丰田小霸王轻型客车,在发动机大修后,用户在开着车回家的途中约行驶了八十多公里的时候便出现了排气管放炮,随后化油器又开始回火,动力性也急剧下降,继续行驶约十几公里因发动机严重乏力而熄火。 将车拖回修理厂后,打起动机很顺利的就着火了,并且发动机工作得也非常平稳,既不回火也不放炮。由此就将点火正时和乱缸的可能性排除。于是便怀疑是点火线圈有故障,拆开分电器盖(该车的点火线圈在分电器 A Toyota YOYO light-weight passenger car equipped with a Toyota 3Y engine, after the engine overhaul, was driven by an exhaust pipe for about 80 kilometers on the way home while driving a car. Then the carburetor Began tempering, dynamic also declined sharply, continue to drive about ten kilometers due to serious lack of engine flameout. After towing the car back to the repair shop, the motivation was very good, and the engine worked very smoothly, neither tempering nor firing. As a result, the ignition timing and the possibility of chaos are excluded. So they suspect that the ignition coil is faulty, open the distributor cover (the ignition coil of the car in the distributor