Hi, I'm thinking you mean PGP. It sounds like the seals are bad. I'm assuming they've been installed for quite some time since so many are leaking. You'll need to buy new sprinklers.
What you can do though is just take the working parts out of the new sprinkler and screw it into the old body so you don't have to completely dig each one up. Good luck!
If I can't fix it, it's broken!