So you're not sure whether you have a vacuum leak in your car? There are a few signs of vacuum leak in a car. One the most know symptom is when a car expreinces a lot stalling and idle. You can test with water to find out if your car vacuum hose has a leak. For more symptoms you can refer to the following article vacuum leak symptoms
If you know you car has a vacuum leak you may want to replace your hose instead of fixing it because repair will cost you more then replacing it with a new one. Please refer to the following video on instruction to fix a vacuum leak