1989 olds cutlass ciera 3.3 stalling while driving like it is starving for gas after stalling it will crank back up and rev up but as soon as you put it in gear it starts jerking and stalling out. No check engine light and only does it at odd times does not matter if hot or cold. I sometimes smell an egg smell out of exhaust but I have not noticed it all the time. have replaced coolant temp sensor and spark module under coil packs and have let run and unplugged maf sensor o2 sensor and other sensors I seen under hood all one at a time while running. all that happened was engine light came on but the stalling was still there any ideas?

I would start more simply first. When was the last time the air intake filter was replaced? Also the spark plugs? I would also see if the car needs the fuel injectors cleaned, you can also avoid cleaning the injectors by every once in a while dumping in fuel injector cleaner or depending on your area the mid grade or high test gas dumped in once and a while can help, I'd say once per mo th is good. The rotten egg smell is a totally separate condition, or is a sign something is to happen, if you have noticed white smoke out the back, then there is a fluid leak that is also going into engine and needs to be fixed.

FUEL PUMP.
Have you checked the fuel flow and pressure?
If the fuel pump is over 160,000kms/100,000miles it's done.
Put in a complete assembly,if your mileage is close to above numbers you need a new pump anyway and it may (90% chance) will cure your rough running engine.The other 10 % is contaminated fuel and electrical, but as you have no codes I'll say FUEL PUMP.