Hello, I have a 1997 Buick LeSabre with 133000 miles that when i go to town,sometimes when i go to leave,put it in Drive it starts to move but will not accelerate it just sort of jerks a little for a few seconds then takes off and runs normal.Does it in drive and reverse. No check engine light except ABS but i don't care about that. I don't think it is the transmission,because when i put it in drive and give it gas it moves but does not accelerate,for a few seconds then it takes off and runs normally. Any ideas?