Warm takeoff sputter?

[BONIN240SX]

I have recently noticed when my car is at operating temperature, if i take off from a stop i can hear and feel it hesitate almost like its dumping to much fuel real quick and then it takes off just fine. the misfire happens around 1700-2050 rpm only its not harsh whatsoever but anoying. its completely stock other than a catback exhaust and from what i can tell the egr is blocked off on the intake manifold? it has new cap/rotor, new plugs, new wires. im going to check my grounds tonight and see if that points me in the right direction, any other ideas?

it is 92 s13 coupe with s14 ka24de engine

[BONIN240SX]

Any help would be appreciated. don't know what direction to go...ive noticed once the car is warm after driving @2500-3000rpm when you take it out of gear the car drops down to about 250rpm and then slowly comes back up to around 650rpm..thank you