Hi I have a ford Sierra RS cosworth I have a level 8 ECU but when the car is running its Island very high around 1100 rpm. I have sent this to different people in the UK and we have changed all sensors on the engine I put a level of six on and the car Idols perfectly. It had a wasted spark board on it which was faulty I was looking to know if anyone had one for sale and also anyone that has suffered this problem how did they resolved it. This is going on years but can't seem to find anyone that knows about it. I even spoke to motorsport development and they had no idea. I'd appreciate if someone could assist me thank you liam.