Code 51

[nissanfreak12]

I am getting down to just the little bugs left to my TT swap. I have code 51, injector circuit. The injectors tested 12ish ohms before putting the engine in the car. There was no corrosion, and all worked fine before the swap. Doing a balance test, all cylinders changed in RPM. When taking a long screwdriver to each injector, they all click. None louder than others. Couple questions...

Will gummed up injectors cause this code?

Will CAS also throw this code?

The harness has newer injector plugs, so it is possible the connections somehow came loose. Idle, the car feels ok, a little rough. Not as bad as running on 5 cylinders. The higher rpm is where you really can feel it. I am up for any ideas.

[BigTDogg (MA)]

How did you attach the new connectors to the harness?

[nissanfreak12]

Solder them in. These were already in with my old engine without any issues. When I get a chance I am going to test them from the ecu to the injector, like in the FSM. Maybe get some insight from that. I am at a total lose with this.

When I retested them Sunday, they all tested at 13.2-13.5. I know the they are good when in the range of 10-14, but could it be possible that since they are getting on the high side, could the ecu just not like where they are at? The ecu was setup by concept z, and came with the engine, and worked fine before the guy sold it to me. I am wondering if this might be the issue.