Well I went on the dyno in the summer at Evo tune down in Durham and had Jamie tune my oled greddy bc. He set it up at 1.2bar low and 1.4 bar high, at 1.2 it was fine but when doing power runs on the dyno at 1.4bar it was splutting (misfire at 4/5k revs). Never had a chance to sorted it bought some coil packs surefire ones from their website. Look identical to the original. I changed the coil pack clips a while ago so it wasn’t them, I bought some new ones again just in case a few weeks ago. Changed the plugs to iridium ones as I had copper in and Jamie said the bkr8eix were the ones people are using for bpu. That didn’t fix it. Just put the new coils in this morning and “whola” fixed it. It had to be the expensive part but hey hoe just glad it’s fixed. The coils must have been breaking down at the 1.4 bar setting, Is there any way in telling which coil/coils are nackered?