troubleshooting 2000 sportage 2wd codes..p0300,p0304,p0302

[landino86]

ok.. the car had the coil packs,wires,spark plugs replaced. but it still runs rough. it idles kind of sputtery but after driving it for a little it seems to get better.i erased the codes and the havent came back. has any one else had experience with this issue??

[KiaDxb]

302 and 304 runs for coil pack based engine missing, which you changed. Its good.

300 is engine misfire which could be cause of any weak cylinder or butterfly issue.

Take it one step at a time. Take a carb cleaner (red and silver one but dont rem the name, you can get it for 15 dhs from any bangali spare part guy) and clean the AFM (Air flow meter) and butterfly and notice. If still engine becomes sputtery then get the engine compression test done to see which engine cylinder is freaking or weak.

No other place to doubt as you have changed the coil and spark plugs already.