Originally Posted by
Billy_RS
I love RS Turbos, but when they start misbehaving like this I hate them lol!
Although it's an expense and a pain, your best bet is to convert it to EFI from a Fiesta RS Turbo, which will eliminate the Metering unit problems for ever and you get turbo chatter as an added bonus

You are dead right. When it is running well its so good. Ive given mfi plenty of chances so efi could well be on the cards but finding all the parts for that now is quite hard. Oh happy days