When I turn on my car after a few hours park for a few minutes it wants to turn on 2002 Honda Civic

When I turn on my car in the mornings for a few minutes it trys to turn off and runs rough but it does not and after that it is oK.

It only happens when it is parked for like over 8 hours. I think cold weather has something to do with it but not sure.

A mechanic and a dealer changed and repair many things but still not fixed. Please write your experience and knowlege?

Thanks, Ben

Asked by for the 2002 Honda Civic
It is hard to say what the problem is without more info, like when was the last time you changed the fuel filter or the spark plugs,what is the current mileage etc.,sounds like it could be a fuel issue if it is happening cold and ok after that, but would require a little more diagnostics to prove and info.
Thank you for responce,

All that been done recently. Milage is 107000 and timing belt has been changed. Mechanic computer showed something is wrong with idle rpm he cleand it and put it back but next morning same problem.