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Fuel Injection Pump Timing Adjustment: Notes

Tools Required 

This procedure should be used after an injection pump installation or when injection timing needs to be checked or adjusted. A scan tool must be used to check or adjust injection timing. A static timing mark can be used as a reference. If a static timing mark is not present on the injection pump mounting flange, one can be scribed to further assist in how far the injection pump needs to be rotated.

Fig 1: Fuel Injection Pump
G01599594Courtesy of GENERAL MOTORS CORP.