Hello, I have an '04 LB7 with Codes P2146, and the 4 injectors fail codes (#1,4,6,7). We have done electrical tests to insure power through the FICM to the injectors. We have gotten feedback from other forums on some of the wiring issues, some of those ideas were for the LLY. Wiggling the wires did not cause a difference in the running. We are in the process of testing the 4 injectors on the drivers side today. I read this morning that if 1 injector fails, it will cause all the injectors in that group to shut down until it is replaced. Any thoughts? Thanks!