My car keeping dying on me in residential areas.

What is your question?

When I drive my car in residential areas I will be at a stop and my car rpms will go up and down and then the car dies but if I hit the gas it tries to go so it doesn't dies just stutters in a way. When I accelerate on the highway it just seems like it stalls a little but I don't have major issues, not sure if it is related. I have gotten a new battery, new throttle body (which seemed to help but now is acting back up), throttle body cleaned (again helped for a couple of days and acted back up), new variable valve timing solenoid, new spark plug in line 4. I am dumping so much money in it and no one seems to know what is really wrong with it. Please help.