[jr_ss]

What are the mods on the car? Let's start with a basic list. The car dying coming up to a stop could be from a non-recirc'd BOV. Check your exhaust gasket and the factory wastegate actuator for possible lag issues. The misfire needs to be sorted. Do not put larger injectors in, without fixing your problem first. Not to mention, larger injectors are a waste unless you are tuned for them. Check the health of your engine while you're at it. A compression and leak down test will tell you quite a bit.