Hello friend..Tu problem could be the following ... your coil may not be working properly and it is heating passing a short operating period ... and when he is heated, he cuts the current circulation internally ... and that is why you have to wait for him to cool for a while and give without any problem the ignition ... Try another coil ... if you do not want to spend for pleasure, give someone a used resolved
That would be a fast solution..Avisans if your case is solved and if not there may be many other您的问题的可能原因。
我希望我对我的谦虚评论有所帮助...问候...豪尔赫。