ZDriver.com - 1986 300zx NA 5spd won’t rev over 3400 under load

My 1986 Nissan 300ZX N/A 5spd runs good while driving for first 5-10 then when it’s warmed up it bogs down and won’t accelerate past 3400rpm under load but if I put in neutral or push in clutch it’s fine. It starts and idles fine all the time. Also, if I unplug the MAF when running it doesn’t change anything at idle. New plugs and wires, just replaced injection harness as well as made sure all connections were good and clean, checked all the battery connections as well as all ground points from battery to body and engine and intake. New fuel pump, pressure at idle is around 38-40psi and 47-48psi with key on. Replaced and or checked all vacuum lines when I changed out injector harness as well. Checked resistance of injectors and all were at 2.3 ohms. Oh and have also replaced the chts as well. So, Not sure if maybe it’s the ecu or injectors or something to cause the MAF sensor to malfunction when it gets warmed up..?