Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> Mercedes Benz >> 1982 >> 300CD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> 5-Cylinder Engines >> Vacuum Control Valve

Vacuum Control Valve

Download the full database via torrent (~1.1 TB)  |  Download Brad's custom LEMON patches
  1. Connect vacuum gauge between thermal vacuum valve and EGR valve. Increase engine speed to 1000 RPM (do not pull on STOP lever).
  2. Vacuum should measure 5.7-6.7 in. Hg on non-Turbo models, and 4.9-5.7 in. Hg on Turbo models. If not, check orifice to ensure it is clean. If level is too high, install a larger orifice. If level is too low, install a smaller orifice. If vacuum level cannot be correctly adjusted, replace vacuum control valve.
scientia non olet · About Brad's Car Manuals