Thanks. Would you recommend installing a new injector in place of the failed Cyl 1 injector, or should I install one of the 5 old ones into Cyl 1 and install the new injector into any Cyl 2-6?

I just read a few posts where that reportedly had spun rod bearings and/or bent rods on these engines. And they had a very similar knocking sound like I had. I don't want to destroy a brand new injector if I end up having a bigger problem than non-functional injector.