How do you change fuel injectors and o-rings in a '97 Chevy cavalier with a 2.2 liter engine?

dont take this the wrong way but if you have to ask you should probably take it to a certified mechanic 90%26#039;s GM 4 cylinder and 6 cylinder engines are very poorly design and you may run the risk ofruining something unrelated. I have been there with my cousins 99 Malibu