So i have been chasing this 421 cylinder 1 High Side to Low Side Open INJ .. I replaced the valve cover gasket/harness/engine pigtail and still am getting the code. My last resort was the injector. Needless to say $200 later my problem is still not fixed. The truck sputters and struggles under a load. Can anyone give me a wiring diagram for the injectors or Give me any advice. The 222 code Im guessing is a relay or one of the brake switches under the dash. I haven't even gotten that far.