I have a B16 swap in my hatch and am getting some studdering like in 1st gear mostly and sometimes 2 in the 2200 to 3500 rpm range. it feels like it is losing fuel pressure or something. EX: if i am starting out in 1st gear i will press on the gas and it will go but when it get to about 2200 rpms or so it seems like the fuel cuts off, but i am giving it full throtle(car is still running). Sometimes if i bob the throtle when this happens it will go, and if i press it hard long enough it will take off. Works fine in hight RPMs, Although if i am driving in 5th gear at 65-70 and step on it, it will speend up then will bogg down then speep up. I dont know it the auto pr3 ecu has to do with it. I fixed the ecu for manual. NOTE: it also did it when i had the d-motor in it.

Oh ya i have TPS from a newer DX i think, i dont know if this could be it.

Well if it is the fuel pump, the car has about 150,000mile on the pump and probably be changed, i have a 2000 si fuel pump i got for $10, its like new, but will it fit in my car without any major problems?

Thanks guys, i did a search already and did not find what i was looking for.