RB25 falls on its a** after 5800, AFR is good, SAFC, stock turbo

[DRIFT2LIVE]

My car:S14 (95 OB1)Rb25det

Mods: 3 inch exhaust, front mount, greddy boost controller, apexi safc.

Just the basics.

Finding out a few days ago that the VVT was not hooked up. Hooking it back up caused it to loose power however the Air/fuel ratio stayed fine.

Disconnecting the VVT it makes more power and the Air/fuel ratio looks almost perfect.

However, more of the bigger problem is. It literally falls on its a** after 5800 rpms. Like no power. Air/fuel stays good but power just drops significantly.

Timing has been adjusted both ways without success. Fuel has been changed to better brand new fuel.

It is a possibility of a crank sensor messing up, just trying to get ideas.

Thanks