Hello everyone! I have been working on this car and just cant seewm to pinpoint the problem. Has problem at take off round 1000 to 1300 rpm where it jumps and jerks. Have replaced fuel pump, plugs, EGR valve, plenum chamber gaskets, map sensor, TPS and idle air valve. Ckecked for vacuum leaks and cant seem to find any. Any help with this would be greatly appreciated. Thanks