This problem seems to come when the weather is cold.
On the first start in the morning the car has a lumpy tickover and smokes quite bad. When the car is warm, a few minuits or so, the problem goes away. It's fine any other time of the day and seems ok in summer.
The problem came back last week and was noticed at the MOT garage. The mechanic added some cleaner to the fuel tank and the problem seems to have gone( for now). Any ideas?
It happened last year and I was told it might be a cold start regulator.
The car has been on a diagnostic machine but no faults were there.