Gentlemen, it ended up being the 9 valves. I have Toro Jar Top valves and rather than change the diaphrams, I ended up replacing them with Hunter valves. I now have another problem and based on the threads I have read her, sounds like I might have got a little dirt in the valves. When I turn on the zones 1 -7 individually, zones 8 and 9 come on as well, everytime. I think there is dirt keeping the diaphrams open..therefore, giving me low pressure on some of the heads. Besides that, sprinklers are working pretty good. Your thoughts?