Failures in a cylinder

I have a problem in cylinder four of a renault 19 gasol

Good night I hope it's not too late. A test is called compression leak test and the steps are:
1. Remove the spark plug of the piston failing
2. Upload the piston to its PMS in compression phase
3. With an adapter put air with little pressure to the combustion chamber.
4. You need to listen to where the air fucks. That is what the air purifier removes and opens the accelerator's papalote, removes the oil buoy and the oil filling plug, radiator plug too.
5. If you hear that the air runs out of admission multiple is an admission valve with a leakage.

Thank you very much, I thank you for a friend hug