Had a bad idle problem. Have had plugs, and wires replaced. Had to have oxygen sensors replaced. One day latter got new code P0172 rich. Had Mass air sensor replaced, still got code then replaced the EGR valve. Idles perfect now, but new problem. Car will jerk backwards when going at a good speed and then letting of the gas.
Wednesday, May 7th, 2014 AT 4:59 PM