[SoCal LS-L]

The throttle position sensor could be a culprit, it tells the computer how far the throttle is pressed. You might also check the coolant temperature sensor, it detects how warm the engine is so the ECU can adjust mixture and timing. The mass airflow sensor detects the amount of air entering the engine and tells the ECU how much fuel to supply, so that could also be at fault but I think the majority here have seen stalling issues with that. Im sure something I havent thought of will be mentioned shortly, some of the other guys here are pros diagnosing the SVX.