joey mccarty

I have replaced the ignition coil, spark plug, injector, fuel filter, map sensor, iac sensor, checked fuel pump and it still acts like it wants to cut out when my revs are over 3100 rpms. the problem is intermittent but happens frequently and i dont want to leave my hisun at a dealer 100 miles away and wait months. It never stalls but it idles rough and sometimes when its real bad i cant go over 10 mph. yes i fasten seat belts