Testing and Inspection of Diesel MFI Pump Fuel Cut Solenoid for 1982 300CD (123153)
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10. Connect tester (83) to vacuum control unit and evacuate
11. Rising pressure on gage means that vacuum control unit of injection pump is subject to leakage.
12. Exchange vacuum control unit of injection pump. See: Service and Repair
13. Constant pressure on gage means that vacuum control unit of injection pump is in order and that key starting valve is subject to leakage.
Exchange key starting system valve.
