N/A SR sputtering when flooring it @ 3500???

[DDDsquad_s13panda]

Oright well since i got my car up and running due to faulty fuel pump, i had yet came across another problem, but never really thought anything of it.

Problem:

Everytime i floor it, no matter what gear im in, it will sputter as if its choking after 3500 rpm and it will keep goin until i get to rev limit which is 7300.

but when i drive fine and slowly increase my RPM, it would do just fine, but not as much of a sputter.

Im really leaning on to doing a full tune-up such as new spark plugs. plug wires, rotor and cap..

But i just want another opinion before i convert everything from OEM to MSD/NGK.

am i on the right track or i should check something else out first?

Is there anywhere else this problem is coming from? besides the sparks thats it... ?


Thanks in advance,

-john

EDIT: my mods if it helps

short ram intake
APexi power filter
370cc injectors
DET manifold
walbro 255 fuel pump
Z TT fuel filter