Hi all. My daughers Cruze is having a little problem. I noticed the idle is rough about every 4 seconds. Runs fine for about 3 seconds, then a hear a noise like air escaping and at the same time the engine is about to die or run rough. The noise is coming from the valve cover on the top left side. I think there is a pvc valve built into this cover. I do have a video of the problem on youtube labled:"2012 Chevy Cruze engine noise".
There is no check engine light. Whats ya think?