Suppose your car has an engine vacuum leak,what will happen is that the air-fuel ratio in your engine will go higher than 14.7:1, also known as a “lean” mixture. What this ratio implies is that there is just too much air in your engine, and because of that the engine will operate poorly or not at all. If you have the feeling that your car has a vacuum leak, please do well to read on to learn the symptoms, as well as understand how to fix them.
Common Problems of an Engine Vacuum Leak


Read more
http://autocareplanet.com/symptoms-of-engine-vacuum-leak-and-solutions/