[GTP Dad]

Welcome to AF!!

Check the wire to the injector. It is also possible that the injector is going bad and may need to be replaced. You may want to try changing the injector to another cylinder to see if the misfire moves. If it does you have the culprit. If not then the wiring may be the culprit.

Also the connectors sometimes don't seat properly. Coat them with dielectric grease and reinstall and see what happens. Good Luck!