Engine Idles rough

My car was was parked for around a month or two before I started it up and noticed the rough idle problem. Before it was running fine. When I started the car up after two month I would drive 15 feet or so and the car would stall and turn off, but it would start right back up. I looked into the problem and I noticed that the air intake duct had a crack and I also noticed the vacuum hose going to the egv valve was completely off. I plug the hose back in and replaced the air intake duct with a new one. The car didn't stall and turn off any more, but I noticed the rough idle. Running on the highway or at 20+mph the car runs fine. I thought maybe it was the egv valve, I checked and cleaned it, it was fine. I also thought maybe it was the MAF sensor, bought and replace with a new one. Same problem. I tried to troubleshoot the car by disconnecting the vacuum hose when the car is running and the car actually runs better when I disconnect the hose that runs to the egv valve, but once I plug the hose with my thumb the car dies. The car isn't throwing any check code. I don't know what else to check.