Hi I know I have asked before regarding this issue on a ford Sierra RS cosworth. I changed over the ECU from a level 6 to a level eight and the engine Idols at 1100 takeover. I have changed the throttle positioning sensor to a four-wheel drive one. And I also rotated the wires in the plug and it's still Idols at 1100 if I plug out the speed idle control valve it goes back to normal takeover. And if I put the level 6 ECU back on it's Idols perfectly. I wonder does anybody know what the issue might be. I have sent it away and I've asked people in motorsport developments and they have no idea. Maybe someone has experienced this issue before and can let me know. Thank you Liam.