1992 Cutlass Supreme 3.1 V6 Auto - Problem was sporadic, but is happening most of the time now. It is very hard to start. Once started it idles fine. It stalls upon acceleration. If you feather the pedal you can usually keep it running and gradually accelerate. I have replaced the fuel pump, fuel filter, MAP sensor, and IAC sensor and cleaned out the throttle body. This was a great car before this nightmare.

Larry

Welcome to AF !!

Have you checked your fuel pressure ?
I know you replaced the pump, but you could have a fuel pressure regulator going out.

When was the last tune up ??
Also have you ran any fuel system cleaners through it ??

SeaFoam & Lucas injector cleaners are both realy good.