Dragging up an old thread here but I have had the same issue for about 4 years, when I bought the car it was fine then one day it was just really difficult to start. I had the fuel pump checked, AAC valve, Temp sensor, changed ECU's, injectors cleaned, even had a modfied plenum put on there for a while. I'm going back to the thought that it may be my injectors, I have a feeling that they may be leaking from the body of the injector. If it was say the AFM or serious issue with the fuel pump then I would be experiencing issues when the engine is on load or when boost comes on. I have also noticed ever since this issue arose that my fuel economy has gotten really poor, 350km to a tank. The only mods I have are a pod, 3" exhaust and FMIC, so I dont see how that could kill the economy.