Why does my Jeep keep stalling?

Ok so I got my jeep about 8 months ago and have had nothing but problems. It started stalling after a few months out of nowhere and one day it stalled out on me on the freeway and it smelled like eggs and fireworks so I was told it was the catalytic converter so I was going to get that fixed but wasnt able to at the time (btw I live in az so it is very hot here) that was the only stall that smelled like that. So as I go on the stalling is getting worse and worse the dealer said he replaced the fuel filter or pump twice but each time it would be good for a couple days and then go back to its usuall stalling, when I asked for the paperwork on everything they have done all I seen with the fuel system complaint was they put in a fuel stabelizer. So my jeep is getting worse and worse it will stall out while driving and while coming to a stop or on idle and almost everyday aroung 1 (my lunch) and 5 (when I get off) I have to sit in the parking lot for about 5-20min trying to start it but it wont start just keeps "cranking" I belive would be the word. Sometime it takes longer but I usually get it started after a while. I havent yet been completely stranded. So a friend told me to unplug all the plugs like to my computer and stuff and spray them with electrical cleaner so I did that and it was running pefect for the rest of that day(yesterdy) I was so happy but then today I was leaving for lunch and it wouldnt start just kept cranking then it stared but stalled on me 3 times durring my usual 5 min drive home. It tends to do it more when its hotter it has never done it in the morning when im leaving to work. I did some reaserch and have found maybe I should get a new pcm or just check if the wires have a good connection. Im just getting fustrated with this jeep it makes me sad. Also I have taken it to ford 4x chevy 2x and jeep 2x none of them could figure it out.