Just for S&G's I would press on electronic sensor connections and main wire harness connections threw out the engine bay, just to make sure they are seated. Make sure you still have the rubber seal inside the MAF sensor connection, might of feel out during a cleaning one time and water/moisture might of got in there.. Double check vaccume even if you think there is no problem, doesn't hurt to look around. A trick to vacumme lines, one is using a throttle cleaner spray, if you hit a leak it should start running ruff, also if you pick up a cheap mechanic stethoscope just pull the metal probe out the rubber tube, so you just have the open tube, and run it along vacumme lines, you should be able to hear the air sucking threw the hose with the hole.
