Starting problems

I have a 91 Buick Park Avenue Ultra. I was told to replace the crankshaft sensor and dissconnect the factory alarm and start to stop stalling. I did this and even though it still stalls, I noticed its not very often anymore. Anyway, I noticed my Park Avenue was struggling to start the other day a few times, almost like the battery was dead. The interior lights came on so I'm sure it wasn't the battery. I replaced the starter and the problem was still there. Now it struggles to start and sometimes will when I pump the gas (so it is receiving gas, you can even smell it). Once it does start you have to keep giving it gas just to keep it alive. Once you take your foot off the gas it stalls. I was thinking maybe its my coil pack? Or my wires from it running to my plugs? Any suggestions would be greatly appreciated.