map sensor replaced

Pretty much the title. I've also replaced the PCV valve & housing assembly that the MAP sensor plugs into and the MAF sensor, since I'm dumb and got the wrong part initially. I'm getting rough idle and misfires, loss of power while moving due to this code. From what I can tell, the next step...

I have had an 02 Buick Lesabre for a few years now. It started having issues a few months back where it wants to stall when I'm coming to a stop. I go to get breakfast in the morning sometimes and it does fine starting up and getting there but wants to die at stops on my way back home. So it...