PCM fires injectors The PCM controls the energizing of the injectors. Each injector has a dedicated pin on the PCM that grounds the injector at the appropriate time for the appropriate duration. If you wire the injectors to ground they will be permanently energized and your engine will not run due to an excessively rich mixture. I searched quite a bit for the thread I remembered reading about deactivating PATS but couldn't find it. There's a wire or jumper that's used on the assembly line. If it was easy a thief could do it and defeat it's purpose. All I could find was by flashing the PCM with a custom tune.