we have been having the odd problem with this 99 fiesta 1.25 zetec. It will run fine then just the odd time it will cut out and refuse to start .the immobliser light flashes and so i think it may be down to the immobiliser .Leave for a while and the car will start and will go again fine for days then do the same thing again .I used to have Ford Probe that had a simlialr problem and you just took it out and joined some wire and that was it cured ,i wonder if the same can apply to this bleeding Fiesta .cheers .

David, February 2009