fresh rebuilt motor

ALL solenoids removed
non-seq conversion
JDM UIM, LIM

DP,MP,CB, Intake, hard IC pipes

Base map on PFC

I have a "flat spot" in the rpm under load

between 1,400 till 2,000 rpm under no load it's fine, rpm blips and rises fast and normally.. car idles fine as well...


but if i'm in a low gear say 2nd or third and the rpm is in that range
u gas it and the car sputters and hesitates and barely wants to go
after 2 grand she comes back alive again and runs great..

o2 Feedback is disabled
turbo's are in non-seq mode


is this a tuning issue? or something else unrelated to the ECU?

i've considered Re-initiazling the Ecu and starting again... but thought i'd check here first.. before i idle for 10 mins pissing the neighbors off