I have tried this but to no avail. After speaking to a friendly renault mechanic i was given the number of an absolute genius, who virginised my ecu, its just like buying a brand new ecu from renault with-out the renault prices, plus the bonus of being code free. Car now starts every time!!! Extra bonus i also have lost that annoying miss-fire. Only wish i had Tradestops number from the start would of saved over ?900.....