Dodge Omni/Horizon/Rampage 1978-1989 Repair Guide

Air Aspirator System

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OPERATION



The aspirator valve utilizes exhaust pressure pulsation to draw clean air from the inside of the air cleaner into the exhaust system. The function is to reduce HC (hydrocarbon) emissions.



Click image to see an enlarged view

Fig. Fig. 1 Exploded view of the air aspirator system components

TESTING



To determine if the air aspirator valve has failed, disconnect the hose from the aspirator inlet. With the engine idling in Neutral, vacuum exhaust pulses can be felt at the aspirator inlet. If hot exhaust gas is escaping from the aspirator inlet, the valve has failed and should be replaced.

REMOVAL & INSTALLATION



Aspirator Valve
  1. Disconnect the air hose from the aspirator valve inlet.
  2.  
  3. Unscrew the valve from the aspirator tube assembly.
  4.  

To install:

  1. Install the aspirators tube, then tighten the tube nut to 25-40 ft. lbs. (54 Nm).
  2.  
  3. Install the aspirator tube bracket screw, tighten to 95 inch lbs. (11 Nm).
  4.  
  5. Connect the air hose to the aspirator valve inlet and the air cleaner nipple.
  6.  

Aspirator Tube Assembly
  1. Disconnect the air hose fro the aspirator valve inlet.
  2.  
  3. Remove the nut securing the aspirator tube assembly to the engine.
  4.  
  5. Remove the aspirator tube.
  6.  
  7. Installation is the reverse of removal. Tighten the tube nut to 25-40 ft. lbs. (34-54 Nm).
  8.  

 
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