Kia Cee'd misfire

I have a 2012 Kia Cee’d 1.6 diesel which seems to "misfire" when accelerating between 1500 and 2000rpm. I use it as a driving school car and having it stutter when entering fast moving roundabouts is definitely a no, no.

It has been seen by two separate Kia dealers and with no warning lights showing. As a result, they have no clue to the problem. The car can perform for an hour or so without doing it and then the problem suddenly reappears. Any ideas?

Asked on 9 September 2014 by gavgav

Answered by Honest John
This has a diesel particulate filter and almost inevitably what will be happening as a result of your low speed running as a driving school car is the DPF has to actively regenerate and the engine will not run normally while this happens. It's virtually unnoticeable except from the instant fuel economy readout on a motorway. But in stop/start running you will feel it. Open a door or window and you will probably be able to smell or feel the additional heat generated. You can't get away from this problem with a diesel engined car first registered on or after 1-1-2011.
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