That has happened to my Kia twice, the first time after spending a lot of money on censors and a used ECM I pulled out the injectors and cleaned them and it was fixed. The second time I ended haveing to replace an injector with a rebuilt one. I only went through 2 fuel pumps, a set of spark plugs and removeing the tank to clean it before I found the bad injector. Mine through engine cods also, that why I bought so many parts but both time the injectors were the problem.
Hope this helps, Dennis

95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.