Hi again guys,I have an 850 chip tuned from SCT,I have changed the exhaust from cat. and back,and K&N air filter.My car accelerates like a rocket but in the middle rpm,while I'm moving.Many times when I start from 1st gear,and change all the gears to high rpm it seems like asomething to keep the car.the pressure most of the time is ok(1.2-1.3 overboost 0.9-1.0 stable)and stays.what should I check?These awful moments,I think many bad things for my car and makes me angry. :angry: