Try this very easy trick.
Get the car running with airfilter off, rev up engine and choke it while revving with the choke or your hand (It may hurt your hand alittle if your doing it right).
Me and my buddy used to call this giving the carb a BLOWJOB, it has cured many driving issues than any other trick out there.
It causes an extreme vacuum in the carb and if anything is lodged it will free the dirt out.