I need to make everyone aware that there may be a glitch with ESC retard on cars running flash 56. Please feel free to email or call me and I will email you a new "flash" and instruct you how to do the flash update. You don't have to be a customer of mine for my assistance. Later today, I will attempt to attach the flash update in this post. If you are using a knock sensor, I strongly recommend doing the re-flash.