Toyota Cressida/Corona/Crown/MarkII 1970-1982 Repair Guide

Vacuum Limiter System

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This system allows fresh air to enter the air intake chamber upon sudden deceleration to reduce hydrocarbons and carbon dioxide emissions. This system is used on the 1980-81 4M and 4-ME engines only.

REMOVAL & INSTALLATION



  1. Remove the two vacuum lines.
  2.  
  3. Remove the intake chamber line.
  4.  
  5. Remove the valve from its mounting.
  6.  
  7. Installation is the reverse of removal.
  8.  

TESTING



  1. Disconnect the air inlet hose of the vacuum limiter from the air connector and plug the air connector port.
  2.  
  3. Start the engine.
  4.  
  5. Close the inlet of the vacuum limiter with your finger.
  6.  
  7. Increase the speed of the engine and then release the throttle.
  8.  
  9. When the throttle valve is opened and closed you should momentarily feel vacuum. If not the vacuum limiter is defective and must be replaced.
  10.  

 
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