A friend of fine has just installed a massive FMIC but after the installation took place the car seems to reach a boost cut and dangerously jerks around the 4000rpm. the cars is an auto has a pod + exhaust nothing else was changed apart from the intercooler the car is running standard boost (car has never been boosted).
Also what we have done is blocked off the hose that used to go into the intercooler pipe.
Any ideas??