Hey guys.
Cars on dyno and its missing between 5-6000rpm weather its 10,20,30psi. we then run it NA (undid the fmic piping) and she ran nice and smooth through to redline 8000rpm. We replaced plugs twice to iridium bkr7iex then changed to bkr7e copper and regaped to 0.6,then changed to brand new coils 9.8mm twice then changed coil pack. No funny noises or anything odd. Tuner changed fuel to leaner an richer to see if that helps and same with timing but it always misses at the same rpm. unsure whats wrong. Cars built so cant be any components such as injectors fuel pump etc
Possible issues maybe
The ecu (link g3 g4 software)
Wer guessing it may be electrical.
has anyone been through this before any answer is appreciated . Thanks