I believe that is incorrect. I seem to remember that the plunger and plate are controlled by SYSTEM pressure in CIS-E, and not by control pressure as in the slightly older CIS. Yup, verified. See ch. 5, p. 24, Fig. 5-10 of Bosch Fuel Injection and Engine Management, Probst 1989 (Robert Bentley Pub). The so-called "pressure actuator" in CIS-E only controls the fuel flow to the injectors, and this controlled flow cannot affect the force on the plunger or plate. It might be a slightly more accurate way of regulating injector pressure, but it sure takes away one of the greatest tuning features of the older CIS.I must have been asleep at the keys last night.
I should have mentioned that the CIS-E system also reduces the control pressure to affect mixture, which reduces the tension on the airflow plate. It just uses a different mechanism to do so - this is the DPR that you measured the miliamps at when tuning your street car.
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