engine trouble, help!!!!

[layotn20]

hi iv got a mk indy fireblade it has the 919 engine fitted. the problem iv got is at times when it feels like it, it will rev to 7-8k and then it sounds like its miss fireing (like a coil pack breaking down or summit) spoke to a few people and they reckon its electrical. like a sensor or sumit. has anybody got any ideas or experienced anythink like this before.

oh and earlyer i left it ticking over for ages and it just cut out temp was bout 100 or just above. not near the red. could it be the ecu getting to warm

any help will be very oppriciated