Idle-hesitation-power and stall problem need advice

[malafo]

Hello my name is Mark and I am looking for advice on my 1991 240sx SE KA24DE motor, manual trans. This is my first Nissan rebuild and I am going through a big learning curve. Car symptons are starts great, random rough idle cold or hot, free revs 5500 to 6000 fairly good, feels like about 1/3 of the horse power, hesitation in all gears after operating temp reached, motor stalls at 4000 after operating temp reached in all gears under load, can feel it in the accelerator pedal.A little car history ( all stock parts )Comlpetely rebuilt motor, Every hose and belt new, new plugs, TPS, MAF, Knock Sen, Fuel pump, Filter, FPR, Injectors cleaned and tested. Any advice appreciated. Thanks.