Fiesta TDCI problems - bobhiggins
We have a Fiesta TDCI that after 2/3months from new developed an intermitant problem that manifests itself as either a short term lack of power, short term rough running or a total engine cut out.
The supplying dealer has failed to sort the problem and does not seem able to apply logic to the diagnosis of the problem. Ford customer assitance does\'nt and the Ford technical helpline suggested a wiring/earth fault unique to the car or a fuel leak in the high pressure distribution.

Has any body else had a similar problem with Fiesta 1.4 TDCI?

Judging by the Mondeo/Focus TDCI problem threads this looks like a similar problem set but I do not know if the designs use the same control scheme as this engine is shared with PSA.

Help!
Fiesta TDCI problems - Malcolm_L
The dealer has acknowledged the problem, IIRC Ford operates on the basis that if they aren't able to fix the fault after 3 attempts you get a new car/engine.

I'm surprised that they haven't been able to pick up the fault using ECU diagnostics but if the fault is a one off it's possible.

Advise your dealer in writing that they have been unable to resolve the problem and you wish the problem rectified.
Ask for the problem to be escalated to Ford Customer Assistance or whatever the next level of support is.

If they can't resolve the problem in a reasonable time frame, ask for a replacement car.

Keep all the paperwork!

Best of luck