HA! I used to do this too - on older, carburated engines. Engine missing when hot and under a load and you've changed everything already? Crank on the throttle, stick that garden hose sprayer in the carburator and let it rip until the engine starts to sputter (don't let it die!). Watch the black goo come out the tail pipe. Repeat until you feel better.
But I have to agree with Big Jim about the ported fuel injection.
