i have a focus 1.8 tdci. when the engine is warm and i am driving in 4th or 5th gear between 1000 and 2000 rpm and try to accelerate there is a misfire. any ideas thanks.
A missfire could be caused by a number of different faults, to identify concern we need to know year and build date of the vehicle, does the vehicle omit any smoke when the fault occurs. Thanks for your question