You didn’t install the o-rings dry, did you?
Many service manuals specify to lube the injector o-rings with engine oil . . . not sure if this applies to your engine, though
Napa auto parts would be a good place to get an o-ring set. I’d go there, before going to Autozone, FWIW
https://www.napaonline.com/napa/en/p/FPBES71188/FPBES71188_0232960538