Hello,
This could be a problem with your coilpack but I would start with your vehicle's Crankshaft Position Sensor[CKP] first. Could you please double check the year of manufacture of your vehicle for me so I can look up some information from our reference for you. I don't have a listing for a 2005 Ford Fiesta. Please get back to us with the year of manufacture and we can go from there.
Thanks,
Alex
2CarPros
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Tuesday, November 26th, 2019 AT 7:19 AM