Diesel 1.4 Fiesta Intermittent 'misfire' And Loss Of Power

[japalmer]

I have a Jan 2008 1.4 diesel fiesta. It 'misfires'/ judders and
momentarily loses power whilst cruising, and occasionally while
accelerating. Last October 2014 it did this for a few seconds and shut
down, had to call out RAC (and was on holiday!). Garage replaced one
injector and said that there was a chance it would happen again, which
it did, and now it it getting worse again. It does this a few times on a
long journey but rarely on shorter journeys. I have had a number of
garages try to find out what is wrong and I am now thinking of getting
rid because I cannot risk a breakdown. So in a last ditch attempt I'm asking for some help.

I like my Fiesta but this fault could leave me stranded and I cannot take the risk with this. Please
help if you can.

[DieselPig]

How many miles has the car done?

You had one injector replaced with new or reconditioned or used?

Did the garage do a leak off test on all injectors?

Did they check for leaking injectors?

[japalmer]

Hi DieselPig, It has done 55000 miles, but has done this since about 20000 - ford garage could find nothing on the diagnostics so did nothing, so too recent check by another garage. Injector replaced with new as far as I know (£213 inc VAT). I don't know if the garage tested for leaks - I could get back to them and see if they can tell me. Thanks