I've never really messed with the vacuum system of our cars, and don't even know what to look for if I have a leak, which I think I do. Which hoses should I look at?

Also, is the EGR and AIR system part of the vacuum? My EGR pipe that runs to my header recently came undone, so I just got a little plug from home depot and plugged up the end of the EGR pipe. I've still got my AIR system. Would that cause any problems?

 

did you plug both sides?

 

spray parts cleaner around where you think the vac leak is coming from and your rpms will increase if the leak is nearby