The correct operation of this fuel system is DEPENDANT on fuel pressure differential. System pressure vs. control pressure. I would attach a fuel pressure gauge & run the car to see if the system is operating properly.
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MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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