Hello all,

I just purchased a used 2003 Ford Focus a few weeks ago and it seems to be a nice car so far. I do have one question. When I first start the car in the morning the engine seems to idle rough for a little while and for a few miles down the road. Then it idles smoothly and is fine until the next cold start up. The engine power is fine and transmission shift fine also.
A

ny ideas?

I do know that the air filter needs changing, but just haven'r picked one up yet.