Hi all, I am new to this site but have had many issues sorted by looking through old posts, some very knowledgeable people on here, I hope someone can help with my latest, I have for the last 2 years been restoring my 90 escort rs turbo, rebuilt engine but used original injection system, when cold the car will start and rev out but seems to me that once the cold start comes off it either idles very rough or not at all , if you manage to get revs up it pops back through the metering head, any ideas , thanks in advance,