i have recently bought a 1997 fiesta auto with an 1250 engine it has done 44000 miles and when at idle and especially when the car is still cold and the choke is still on the car tries to drag itself along when in drive it causes stalling if i can,t get it in neutral quick enough someone said it is the torque converter,why is this playing up and would it be very much to get it fixed.i have owned micra and rover auto,s with no problem before,could this be particular to fiesta,s. thanks