Yes, and EMS should take care of that. I know for sure the MPI does because it controlls the MAF voltage and that's why you are getting fuel cut, because you are maxing it out. But the MPI also adjusts timing which will allow you to go to higher boost levels then just a fuel controller. Whatever you do, you will need some type of EMS to take care of that. And I would DEFINATLY not go with the FCD, too risky, save the money and do it right.....MPI!(thumb)