acceleration stumble hesitation at normal idle (900-1000rpms)

really, you need to have a good Diagnostic tech look over the data stream. You could have a wiring problem/worn out engine management harness that is causing the computer to tell the engine to idle high when it should not. do this before you replace any more parts that do not fix your problem.

please check your o2 sensor is likely your problem they four

dude its soo easy ,, i just did my ride … clean your throttle body with throttle body cleaner .. it cost $4.15 the little can. then clean your MAS with MAS cleaner. then after you do that your rpms will improve to like 2500 rpms. then with that cleaned get a screw driver and loosen one screw on the throttle body . bring it down to like 600 rpms and car will sound like its not even on .. dont ever go buy things before cleaning. you can even clean your spark plugs ..