Does anybody happen to know if the o rings are the same size top and bottom? We got an OBDII code P0201 Injector Circuit Open Cylinder 1 last night so I pulled the fuel rail to swap the injectors on cylinder 1 and 2 to see if the issue is with the harness or injector, and I picked up a set of new o rings while I was at the parts store. The problem is the set only came with 4... Since there are 8 total I'm not sure where they are intended to go, and if picking up a second set would get me the correct ones on both ends. For now I'm just sticking the injectors back in in a different order for troubleshooting but before I button things back up I might as well replace the o rings correctly. Any thoughts?