I have a ford fiesta that first of all started off stuttering/loss of power and now wont stay running when the engine is cold 
please help!!!
Model year, mileage, standard or automatic? 54 plate??
fiesta 1.4 lx 54 reg plate
manual
Could be a vacuum hose that’s leaking, among many things.
What are you capable of doing yourself?
A 54 plate would mean a Ford Fiesta, sold in the UK between Sep 1 2004 and Feb 28 2005.