I have a ford fiesta 1.1 HCS push rod engine with single point injection.
I had blue smoke when revved hard so I have replaced the Head gasket and valve stem oil seals.
I have tried swapping map, o2 sensors.
I had a smell of egg so swapped over the o2 sensor.
The car run's rich as you can smell it.
I can either get white smoke or blue smoke by swapping sensors.
I used to have alot of blow back from the oil filler cap but thats sorted since I replaced the valve stem oil seals.
White smoke indicates water but I don't know where its coming from, if its leaking at all.
Has anyone had the same problem???