Clean the MAF and the IAC. The MAF needs either spray electrical parts cleaner without contact oil, or MAF cleaner from the auto parts store. The IAC needs carb cleaner. You also want to double check to be sure that there are no hoses that aren't connected on both sides anywhere on the engine. If you find the VECI sticker under the hood, it gives a schematic of the vacuum routing, and that should help you locate all the lines if you're not familiar with what to look for.