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Injector Timing

  1. Check alignment of injection pump marks. If marks are not within tolerance shown in Fig 1, timing is necessary. Loosen 3 retaining nuts and turn pump with 3/4" (19 mm) wrench (J-29872) on boss at front of pump. Tighten nuts and adjust throttle linkage.
  2. Disconnect cruise control and transmission linkage. Disconnect pump rod, loosen lock nut, and shorten rod several turns. Rotate throttle lever to full-throttle position and lengthen rod until it fits with lever just contacting full-throttle stop. Reconnect linkage from cruise control or transmission.
    Fig 1: Timing Marks on Adaptor & Injection Pump. Marks must be aligned within this tolerance.
    G09360427Courtesy of GENERAL MOTORS COMPANY
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