Hey guys... I have a gsr swapped into my 96 coupe and have a sensor question (obviously...lol)

I don't have exhaust on yet, waiting on UPS, grrr to holiday...

When ever I accelerate and reach 1500 rpms the acceleration fluctuates really bad, like a bad iacv at idle, but I'm not just idling...

I have replaced map but haven't gone any further yet... thought I'd see what everyones thoughts were. thanks in advance!

 

any codes ? poss bad crank sensor ?