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Message: [QUOTE="Tiha, post: 1563550, member: 33189"] Friend of mine just called me back from the diesel shop said he had to get his mind back to the Ford mindset and after talking with his co workers. One of the reasons I hate calling him is because they see the worst of the worst. They have dealerships tow stuff into them when they can't figure it out. They said I need to check the pressure control valve on the left rail. It most certainly will create a no start condition. But that it is odd I don't see any blip in rail pressure and that would indicate the Pressure control is probably not the cause but still you don't know until you flow test it. To them pressure control valve is a common failure. Next he said the flow control valve in the top of the pump. He said they don't fail often but they do fail, if my screwing with it caused it to fail or stick closed that would most certainly cause exactly what I am seeing and explain the suddenness of it all. Asked him about the "inlet suction valve bad" test I did with the flow shooting out of the injector. he said they never heard of that. So don't take that as a fail indicator. He said, pull the injectors and let him bench test them. Since the injectors need back pressure to operate properly my return flow test was worthless. Well he didn't say that, but I get the idea. They have to be tested properly and that they do frequently find bad injectors, they pop once or twice and stick, dumping fuel out the return. He also added the caveat that he doesn't know the back story of the injectors he is often testing, but from his point of view 6.7 injectors fail all the time. Added; as you can see in most cases people that put in a decontamination kit even with a Clean flow control valve will have fixed any one of those issues and more. But for someone that wants to actually find the problem I have a lot of troubleshooting to do yet. And at the end of the day it could still be a failed CP4. Not sure what I will do first. Kind of wanted to write it all down, hoping to not forget anything since I don't know when I will take up this project again. All I can think is crap, If I pull injectors then I just as well better do valve cover gaskets and something with the CCV. then why not glow plugs too? It just never ends. [/QUOTE]