Car stumbles @ 2-2500 rpm

[Jay99420aturbo]

My car stumbles or jerks back and forth around betwwen 2000 and 2500 rpm. It stops after I give it a bit more gas and the car hits 3000rpm and starts to hit peak boost, what could it be? my mods are in my profile

 

[VelocitàPaola]

Does this jerking happen at any particular point in terms of boost?

 

[BigRand]

Hey jay, could be that FCD from hahn. Make sure its all connected properly

 

[420a-t]

mine did that for a while too. does your car idle fine? my fcd was shorting out causing the map to trip out. i dont know if yours could be doing that or not. do what Big Rand said and check that fcd

 

[Jay99420aturbo]

I did a fuel pump rewire and that solved it .....thanks for the info guys...