Why is my Ford Focus misfiring?

I bought a 2012 Ford Focus 1.6 TDCi about 5 months ago, after 3 1/2 months (out of warranty) it started to develop a misfire when warm. Driving along at 30mph in third or fourth is difficult, but at 50mph it misses a beat and pulls back frequently. At tickover, when warm, the misfire is obvious when the throttle is gently pressed - time lapse before it revs. Went to a diesel specialist and they saw no fault codes on their machine. It happened once when they had my car. They updated the cars software. Car was a bit better for two days and then the problem reappeared. Update £60, total bill over £140. Company happy to investigate further. I cannot take this car on long journeys as it's too difficult to drive in town and open road, and keeps pulling back and juddering. Any ideas? Ken
We've had reports of EGRs getting choked up at 80,000 miles, which is not unusual for EGRs generally. Also turbo bearing failure because the bearing oil feed and oil return pipes have become choked with carbon from switching off when the turbo was too hot. More here: www.honestjohn.co.uk/carbycar/ford/focus-2011/?sec.../ This model Focus is joint 3rd most complained about car: www.honestjohn.co.uk/news/new-cars/2016-12/top-10-.../ But if you bought it from a dealer then that dealer is responsible for any fault that could have been present or developing on the date of sale fort 6 months from the date of sale. See: www.honestjohn.co.uk/faq/consumer-rights/
Answered by Honest John on

Ask Honest John