installed the jdm subaru twin scroll ecu in my euro sti 05 with a vf34. have walboro fuel pump and regulator. intake and exhaust all done up. but realised while hard driving, the car seems to "jerk" or pull backl at around 6000k rpm?? why??not enough fuel or is the ecu still learning??

 

I'm not really sure what the difference is between the twin scroll ecu (RA Spec C/S202/3/4) and the normal ecu .....but I do know that the VF34 is NOT a twin scroll turbo.....so why on earth did you want to get the twin scroll ecu? That could be the problem because the ecu is opening the wastegate at the wrong time because it thinks there is a twin scroll turbo attached to it. Also, did you get the ecu tuned for your mods? if not, that is def. your problem, any major mods installed on your car will need the ecu to be tuned in order to get the most out of your add-ons......plus it will help prevent you from blowing up your car.

-Ted

edit: the ecu will only "learn" a little bit.....it cannot re-tune itself to match your new mods.