Ford Fiesta cuts out

I have a 93 plate 1300 Fiesta, just this week the engine has started to cut out. it starts okay but usually in the morning after it has been stood out
all night as soon as i reverse up the drive and stop to check traffic it cuts out, it starts gain straight away and pulls away okay and drives off okay on ocassion when i stop at the junction at the top of the road it will do it again. i have also noticed a lot of smoke as i start, but it has been like this for a while. i have checked for air leaks and the condition of the air filter it has recently had new plug leads i am now struggling to understans what is going on.
many thanks
for any help
Paul Nithsdale
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