Hello, I have a peuyot expert, and it does not start after being 6 or 7 months stopped, and changed the low pressure pump because it was stuck and did not go. The diesel filter changed, solved that problem checking the output of high pressure does not come out or pressure drop, it is a Boch CP1 pump, it has a flow rate valve, 12 volts arrives in terminal 2. And given mass in case the valve is the cause that the engine is not generated by the engine and remains the same, without flow. Is that valve necessary so that it generates pressure? If it had little low pressure, it would also be the cause so that there is no diesel for high pressure? In any case any suggestion to try me well