No high rpm?

[gomezmk]

I checked all the plugs, coil packs, wires it's all good. It does not miss, it just stops pulling after 5,000 rpm. It does matter whether the motor is in boost or not, it does it also in neutral so that rules out alot of stuff such as ignition wise being faulty or weak. I'm suspecting either an rpm input such as a cps where data at higher speeds is getting corrupted before it inputs to the ecm or the ecm itself being faulty. It seems engine speed input is the source of the problem.