Know the feeling have had a few issues with mine the last couple of years and can't get to the bottom of it, started with a random cut out then after waiting to cool it started again, it then went altogether and tried everything I knew to get it going without luck, eventually found an issue with phase sensor wiring, but still had an occasional misfire and am struggling to find the cause. This year have completely removed engine loom and tested every connection and replaced all plugs and terminals so Hoping I have solved it. I am waiting to upgrade to stage3 but need this all sorting before. I can honestly say messing with the loom is a bitch of a job but needs must.