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cloth. – Remove the fuel return line connection from cylinder 1. Press the connection at the tabs -2- downward and pull the center piece -1- upward to release. Note Pay attention to cleanliness. Dirt must not enter the return line and the connection on the fuel injectors. – Install the Fuel Return System Tester - VAS6330- between the return line connection on the fuel injector and the return line. – Start the engine and let it run at idle speed. 3.12 Overview - Intake Manifold with Attach‐ ments DANGER! ♦ Follow the safety precautions when working on the diesel direct fuel injection system. Refer to ⇒ “1 Safety Precautions when Working on Diesel Direct Fuel Injection System”, page 303 . ♦ Pay attention to the guidelines for clean working condi‐ tions. Refer to ⇒ “2 Guidelines for Clean Working Conditions”, Always pay attention to these instructions before and during work. 3. Diesel Direct Injection System 331 |