I have a 2.0 petrol 06 c max ghia. This morning the car really struggled to start. Took about 8 attempts and when it did finally fire up quite a bit of black smoke came out the exhaust. Once running the car ran fine. I went and done some shopping which left the car for about 30 minutes, started first time. Came home, left the car for about an hour and thought I'd try and turn it over. Needless to say it didn't fire until the 3rd attempt, no smoke this time. I did see on another post somebody mention possible EGR valve...reason I've included this is that last year the engine management light came on and was diagnosed with EGR valve problem, had the fault cleared (MOT due), but the light came back on but strangely disappeared about a week later, that was 3 months ago.