Rough running 93 Max

[Johnnymax]

Good afternoon. Gotta 1993 Maxima that runs rough. It's a 1 owner car with 198,200 on it, always maintained. The day I went to sell it, it began. Started to run rough at 1/4 tank. Filled it up with a can of injector cleaner. Started to run great. Back to 1/4 tank and it began again. Now won't stop. I am guessing an injector problem. Can I do this myself?? Any help is appreciated. Thanks in advance. John

[canucklehead]

MAYBE...try one of those injector cleaner services offered by most shops. They flush with a heavier duty cleaner.

since this happens at lower fuel level, I wonder if maybe it's fuel pump issue??