Hi, First you disconnect the hose from the PCV and slowly pour half a can into the intake while the car is runnig. Then you shut the car off for about five minutes. During this time you reconnect the PVC value. After five minutes you start the car and go for a ride. You will see lots of white smoke from the tail pipe (carbon). Eventurally it will clear up as you drive. You will immedatley notice more power, quicker starts, smoother idle, and better gas milage, beacuse your intake & injecters have been cleaned