GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Diesel Vacuum Regulator Valve

Print

ADJUSTMENT



  1. Disconnect the EGR valve pipe assembly from the air crossover, then remove the air crossover.
  2.  
  3. Disconnect the throttle cable and the TV cable from the pump throttle lever.
  4.  
  5. Loosen the vacuum regulator valve-to-injection pump bolts.
  6.  
  7. Install tool BT-7944 or J-26701-15 to the injection pump throttle lever, then place angle gauge tool BT-7704 or J-26701 on the adapter.
  8.  

It may be necessary to file the tool so that it can fit on the pump's thicker throttle lever.

  1. Move the throttle lever to the wide open position and set the angle gauge to 0°.
  2.  
  3. Center the bubble in the level, then set the gauge to 49°. Rotate the throttle lever so that the bubble is centered.
  4.  
  5. Attach a vacuum source to port A and the vacuum gauge to port B , then apply 22 in. Hg (74 kPa) vacuum to port A .
  6.  
  7. Rotate the vacuum valve clockwise until 10.3-10.9 in. Hg (35-38 kPa) vacuum is obtained.
  8.  
  9. Tighten the vacuum bolts, then remove the vacuum source and the gauge.
  10.  
  11. Connect the throttle cable and the TV cables to the pump throttle lever, then remove the intake manifold screens.
  12.  
  13. Install the air crossover and the EGR valve pipe assembly to the crossover. Tighten the bolts to 19 ft. lbs. (26 Nm).
  14.  

 
label.common.footer.alt.autozoneLogo