1999 Plymouth Breeze Car shudders and jerks at stop lights

Shakes or Wobbles problem
1999 Plymouth Breeze 4 cyl Automatic 120000 miles

Car has been shaking and shuddering but when I would add gas cleaner it would stop. Recently I had a fuel injection flush done and it stopped completely for three days. But then it started back up again shuddering and jerking at stop lights and in reverse. I added gas cleaner but that didnt help this time. I talked to the mechanic and he thinks it may need new fuel injectors. Any ideas?