Jimmy stalling--no acceleration

96 Jimmy with 4.3 W engine 168 k miles. No codes (check engine light) are being set. Following warm up, when depressing the throttle, the engine appears to die (under load--does not do this in neutral). When releasing the throttle, the engine comes back alive. I can ease the throttle to a certain point, but past that I only get induction sound and the engine does not pull. When I stop at a redlight the engine may continue to run, or the rpms drop to 500 and then as soon as I start to go, the engine stalls and it takes several tries to restart.

I have cleaned the MAF, checked the EGR, replaced the PCV, changed the fuel filter, o2 sensors are 6 months old, checked lines for vacumn leaks. Did I mention no codes are being set?

Other probably unrelated info is: catalytic converter rattling, ABS light on all the time, air bag light on all the time.

Any ideas or experience?

flivesay