How lucky I am to have stumbled upon this thread. I am experiencing the exact same problem with Orbit pre-assembled manifolds. You were lucky to get answers right away from them. I gave up after about four weeks. I am interested in knowing if the new solenoids were free of charge and if they solved the problem. I can unscrew the solenoids about ten degrees to get full pressure. It would also be helpful to have the name of a direct contact at Orbit (if there is such a thing).
