Need a little more info here. Can you supply the model # of the valve or at least tell me if the top portion is secured by screws or is it a jar top type of valve. For the moment I'll asume that all the components you replaced are good and your getting juice to the solinoids. If thats the case it's more likely a hydraulic problem, which may be easily fixed. Also, is it happening to all four valves or are some working properly off the controller.