I'd suggest having someone with a fuel pressure guage check your fuel pressure and rest pressure. Rest pressure is the pressure that the fuel system should hold (near normal fuel pressure) after you turn the key off. It shouldn't drop down to zero immediately after turning off the ignition.

I believe your car has a fuel pressure regulator located on the injector rail. If so, after running the engine (warm eng), turn it off and remove the vacuum hose from its bottom side (facing downwards). If you see gas dripping from it, that's your problem. When those leak into the vacuum hose, gas gets sucked into the intake manifold and it'll start hard and chug, sometimes smoke as there's then way too much fuel entering the cylinders.