上次engine等亮了一次,code顯示cylinder3 misfire,但後來再沒有出現。昨天換了spark plug,開了幾十miles沒問題。但今天下午路上突然engine燈又亮了,讀code顯示:Definition: Vacuum cut valve bypass valve. Probable cause: Failed vacuum cut valve bypass valve; Blocked line. 頭都大了!