My fuel injector is leaking in my 2005 Chevy Cavalier. How do I fix this?

What is your question?

My fuel injector is leaking in my 2005 Chevy Cavalier. You can smell the gas when the car is turned on when you pop the hood you can see where it's leaking in between the rings of the fuel injector. How do I fix this without taking it to a shop, and how much are the parts for me to buy on my own?

How long has your 2005 Chevrolet Cavalier had this problem?

2 days