Rough running Focus diesel?

When trying to accelerate hard in 4th or 5th gear my 2006 Focus TDCi is prone to misfiring with the resulting loss in power. At all other times acceleration is fine. What could be the cause of this?

Asked on 21 October 2012 by AY

Answered by Honest John
Gummed up injectors. Switch to Shell V-Power diesel and see if a couple of tankfuls of that clears it.
Similar questions
Anybody else suffer flat spots at low revs in the Ford Focus 1.8 TDCI or find it easy to stall at low revs in first and second gear?
When I first start my 2001 Ford Mondeo in the morning it is great, however when the engine warms up I start having problems. It doesn't matter what gear I'm in, whilst trying to accelerate it jumps forward....
When starting my 2010 Ford Mondeo from cold I can hear a light rattle/tinkle when under acceleration between 1250 - 2000rpm. There is no noise when warm and no noise when cold and not under load. There's...
Related models
Superb blend of keen handling and ride comfort. Seats five in comfort. five-star Euro NCAP crash test rating.

Ask Honest John

Value my car