You NEED to get a chip burned for the injectors. Yes, there is always a little tuning to be done on the addition of any mod - even going from the stock air box to a cold air intake to get the maximum performance from your car. When doing the fuel pump, don't forget to add an adjustable fuel pressure regulator to help in tuning. Also I think it is easier to do one thing at a time. After one part is instaled, take the car for a drive and make sure it is running properly. That way, if something isn't working right, you know what part caused it and it makes the fix easier. I first put in the fuel pump and adj fuel pressure reg. and tuned the car. Then I swapped injectors and chip and tuned the car. Then I swapped turbos and tuned yet again. The car felt faster with every change.