Need HELP ASAP

[Gigex1]

Alright guys.

So here's the deal, I just swapped to stage 3. but changed the maf before i got my chip and decided to go back but when i did. the car ran like s*** when it was cold. wouldn't rev or go into boost.

And now i got the chip and put it in. with the z32 maf as well. the same thing is happening but it problem is constant. even when the car is at normal op temp.

Also i took it for a spin and it seems like the fuel is just randomly cutting out. it would accurate then just cut out. and slow down until i let go of the gas.

The problem only started after i changed the maf, but even when i went to the stock one i still have it so What could be the problem ?

Dropping Resistor ? or somthing like that. Please help i have no codes and have no idea whats going on.

Thanks.

Btw the car has a s14-t28, gtr injectors, nismo fpr, FMIC, z32 fuel filter, Walbro fuel pump.