I have a 1999 ford escort in dec. I had to replace the head gasket. a month or so after that it started bump jumping. at first it started jumping bad around 45 miles an hour. Then it started doing it at a lower speed taking off in first gear it almost don't want to go it jumps so bad. I've changed plugs, wires, coil pack a few more things that people have told me to try... nothing. I think these cars need to be recalled and a different car replaced to me. Thanks for your time reading this. Whew that vent felt good. Billy jo