2nd turbo cuts off at 6000-6500 rpm
 

Hey guys, my 2nd turbo is working fine now but it cuts off at 6000-6500 rpm !?!?

For example I'm in 3rd and push it, my 2nd turbo kicks in at ~4500 like usual but at ~6000 I have to shift into 4th to keep my boost otherwize it cuts off...

It does that in every gear.

Why is that?
Could it be a bad solenoid, wastegate, vaccum hose?

Give me suggestions
Thanks !
Carl

2nd turbo cuts off
 

I was thinking, could it be a fuel cut?
If it's that, what's the next step? changing the Fuel Pump or ECU ?

I have :
HKS downpipe
Apexi N1 Catback
Apexi Super Intakes
Greddy Turbo Boost Controler (I still get the problem with the controller OFF).
Stock ECU

-Carl

id say it is time for an ecu upgrade. it might just be a fuel cut. . . very dangerous, indeed. hehe. ecu is a must anyways. get a pfc. . . very nice. . . indeed. hehe.

i dunno what the fuel cut is supposed to cut off at though. . . so maybe not.

What's your boost pattern?

fuel cut happens at specific boost levels, usually around 12-13psi on the stock ECU, get a fuel cut defener if your running over 12psi boost if the fuel is still good.

or a power fc with datalogit :D