jhd69
New member
my sons case 580c will start instantly and idle just fine. however when you try to increase engine speed it will increase to about 40 percent speed then starts to buck a little and will not go any higher. he said this problem occurred all at once while using the machine. we have changed fuel filters and bled out same, checked fuel tank for good fuel flow. believe injection pump is faulty. it is a stanadyne dbo 3205 pump. someone mentioned a sheared key could cause this problem. sheared key on what? and if so can i fix it myself? i'd be gratefull for anyones help on this problem. thanks in advance . jd