s13 sr20 Hesitation with load/no load

[nolandavid]

Okay so it's a redtop sr20 in a s14 with a wiring specialties harness no mods to sr20. I have been traying to find out wtf my sr20 is saying to me, it's has a hesitation and dose not like revving up in neutral or under a load. In neutral it will rev to 4k if you hold it at wot, under a load about 3k is as high it will go.

THING I HAVE TESTED.

MAF: power wire 12.28v with key on.

MAF: signal wire with car at temp 1.6v running

TPS: 5.17v to it.

TPS: closed .44v

I preformed a leak down on inter cooler piping.

Any ideas will be helpful THANKS.

[OnTheChip]

It could be a fuel delivery problem. Checked fuel pressure? How old is the fuel filter?

[Dboyizmlg]

Stock SR20 with factory injectors and ECU?

[nolandavid]

new fuel filter, 255 fuel pump, i had this harness on another s13 sr20 that had power-fc with tune and it was doing the same shit! Im thinking wiring but were im not sure.