when i go to shift the car starts jerking and when i give it gas.has 176,000 miles on it.had 173,000 when i bought it the car is immaculate. its starting to jerk like hell when driving then after shifting too. it starting to worry me.i have two cars but its my weekend car.someone said may be the plugs and wires.im going to have them changed if ya'll know anything about this problem let me know