可以(yi)通過(guo)觀(guan)察發(fa)動機工作狀(zhuang)態、檢(jian)測(ce)火花塞以(yi)及檢(jian)查點火線圈(quan)外(wai)觀(guan)等(deng)方面，判斷汽(qi)車點火線圈(quan)是否壞了(le)。

發(fa)動(dong)(dong)機(ji)啟動(dong)(dong)困(kun)難，尤(you)其是(shi)在寒冷天氣(qi)更為明顯(xian)，這(zhe)可能是(shi)點(dian)(dian)(dian)火(huo)線(xian)圈(quan)故障。因為其損(sun)壞會導致(zhi)產生(sheng)的高壓電(dian)不(bu)(bu)足，火(huo)花塞難以正常點(dian)(dian)(dian)火(huo)。動(dong)(dong)力下(xia)降、油(you)耗增(zeng)加也是(shi)典型表現(xian)，由于(yu)點(dian)(dian)(dian)火(huo)線(xian)圈(quan)工作異常，火(huo)花塞點(dian)(dian)(dian)火(huo)不(bu)(bu)穩(wen)定，混合氣(qi)燃燒不(bu)(bu)充(chong)分(fen)，致(zhi)使(shi)(shi)加速無力且油(you)耗大幅上(shang)升(sheng)。發(fa)動(dong)(dong)機(ji)運轉時抖動(dong)(dong)并伴(ban)有“突(tu)突(tu)”異響，在怠速或低速時尤(you)為明顯(xian)，這(zhe)是(shi)因為點(dian)(dian)(dian)火(huo)線(xian)圈(quan)損(sun)壞使(shi)(shi)得個別氣(qi)缸工作不(bu)(bu)正常。

火(huo)(huo)花塞狀態也能反(fan)映點(dian)(dian)火(huo)(huo)線(xian)(xian)圈情(qing)況，若電(dian)極積碳、燒(shao)蝕嚴(yan)重，很可(ke)能是點(dian)(dian)火(huo)(huo)線(xian)(xian)圈提供的高(gao)壓(ya)(ya)電(dian)不(bu)穩定或(huo)不(bu)足。此外(wai)，肉眼觀察點(dian)(dian)火(huo)(huo)線(xian)(xian)圈的絕緣蓋，若有(you)明顯裂紋或(huo)裂縫，周(zhou)圍有(you)異常絕緣物滲出，高(gao)壓(ya)(ya)阻(zu)尼(ni)線(xian)(xian)插(cha)位不(bu)穩固(gu)(gu)，接(jie)線(xian)(xian)柱焊接(jie)不(bu)牢(lao)固(gu)(gu)等(deng)，都表明點(dian)(dian)火(huo)(huo)線(xian)(xian)圈可(ke)能存在故障(zhang)。

當出現(xian)上(shang)述這(zhe)些情(qing)況時，就需(xu)要(yao)警惕汽(qi)車點火線圈是否(fou)損(sun)壞(huai)，一(yi)旦懷疑(yi)，應及時前(qian)往專業(ye)汽(qi)車維(wei)修店(dian)進行檢(jian)測和維(wei)修，保障車輛正(zheng)常運行。