Quote Originally Posted by J57ltr View Post
The schader valve is before the regulator which means that it is subject to the same pressure the injectors inlet. It should rise when the engine is running and you disconnect the line from the regulator. When the line is reconnected it will with the level of vacuum.

Going forward a cheap and easy way to read codes and data if you have an android phone is the BAFX elm327 Bluetooth module and the Torque pro app. It allows you to do anything a code reader can do plus monitor live data like O2 voltage, timing, injector pulse width and almost anything you can dream of all for less than $30. That gives you a lot more data than just watching pressure from the gauge.

Jeff
I have that, have not gone into great detail with it yet. I suppose I should now. I did however scan for engine codes and nothing has been logged. I will add looking at the live data to my to do list.