When you went back to the stock tune did you have the stock injectors in the car ? stock tune with bigger Inj wont run right and could try to start and die
I would do this with the stock may like your starting the car as it was stock , if it starts then your tuner has some work to do
I keep asking for your ECU code , if it is a US ecu code then I can send you a tune to see if it will start
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!