1996 Volkswagen Jetta dies when throttle is applied

My 96 jetta will start and the engine runs really rough at idle as soon as any throttle is applied it will stall out immediantly. When it broke down I replaced the coil pack and was able to drive it home but could smell the catalytic converter (smells like rotten eggs). The next day I tried to start it and had almost the same symtoms as before I replaced the coil but engine is running even worse and dies seconds after starting it.