Hi all, a bit new here, I have issues with starting my fiesta, I will try and be as thorough as possible.

2005 Fiesta MK6.5 1.6 zetec S

The car starts fine when warm , but when it has been left for a time to cool down that's when I get my issue.

Bought the car just under two weeks ago, the second hand trader has given us a 80 day mechanical warranty (engine and gearbox)

The car developed a issue a few days after we bought it. On a cold start, it was cranking and idling really rough,sputtering almost, with the added white smoke from the exhaust (aftermarket one) you had rev the engine for it to run smoothly.

I had the battery testes and forked out £106.99 for a new 5 year Bosch as the cold start amp was 49% when left over night - thought this would solve my problem.

I left the car to cool down again to test the new battery and the majority of the time it starts fine. But i am still getting the rough idle with a bit of white smoke when you first start it from cold. I didnt rev the engine this time and it cut out again , if you rev the car its fine.

I have read about possible injectors needing cleaned? checking the MAF sensor and also checking the spark plugs? but I have no idea where the MAF sensor is on this model? crankcase breather pipe? (dont know where that is) the list is endless....

Surley there is someone else out there with the same problem

I dont want to take it back to the dealers as its 20miles away in Southampton, and the issues only seems to be when the engine has cooled right down (couple of hours)

Please help, any suggestions would be amazing, im just stumped.