My wifes 2004 1.8TDCI Focus has been a real great car. It's done 140k miles without much of a problem. However this year it has had starting problems. The car starts first time but refuses to idle. A mixture of white & black smoke comes out of the exhaust in between the start and stop.
If the car is started by turning the ignition on, glow plug light on then off and count to 10, three times it will start, although it will still run rough until warmed up.
Once running the car is perfect, 58 avg MPG, goes like S**t off a shovel for a diesel, much better than mine which is the same car but a 2006 model with the same engine.
Glow plugs have been changed but no difference.