misfire on cylinders one and two on 1997 Hyundai Elantra

about every one hundred miles I get a misfire code P0301 or P0302 and sometimes I get both at once. Replacing injectors is getting costly.

Asked by for the 1997 Hyundai Elantra
plugs and coils is where you start. these are basic maintenance items.
did you change these yet??