I got to play with the AE today. I came up with a P1298 IDM failer code and a P0284 cyl. 8 injector circuit contribution balance fault. I have been having a cold start problem. When cold the buzz test has 2 weak injectors. Sounds better after engine is warmer. Is this IDM failer part of the problem with the cold start? I have already changed the GPR and glow plugs, along with the UVCH. Glow plugs are working.