ok my sister came here fome texas with a 96 ford contour with 107,000 miles on it. she says she needs me to do a few things to it for her. i take it for a ride. good for city driving but, on the exspressway,wow does not go over 75 when at 50 when you hit the gas it shakes real bad. i ask her how long it has done that she said since she bought it. that was a month ago. i asked her how much she paid for it she said 4,000. i about smaked her. what could make the car do that. i am lost. any thoughts. i was told to make a big bomb out of it. cant do that its a contour must be saved. lol.