Timing Procedure

1. Start and idle engine until warm.

2. Install Tech 1 scan tool.

3. Activate "TDC OFFSET LEARN" in "OUTPUT TEST" / "INJ PUMP" section of Tech 1 scan tool.

NOTE: If engine stalls during TDC offset activation, * slightly rotate pump toward the driver side of the vehicle, tighten mounting nuts and repeat Step 3.

4. If the learned "TDC OFFSET" is between .0 and -.5 degrees, procedure is complete; If not, slightly rotate pump * and retighten mounting nuts. Repeat Steps 3 and 4 until "TDC OFFSET" value is between .0 and -.5 degrees.

NOTE:
To achieve a negative (-) number, rotate pump toward driver side; a positive (+) number, rotate toward passenger side 1mm pump movement = approximately 2 degrees

* Engine MUST be shut off prior to rotating the pump, scribe the pump housing and flange before loosening the bolts for a point of reference.





The manufacturing process for injection pump timing is different than the procedure available to the field. Learned offsets between +.75 to -1.75 on production built engines are normal. Because a different technique is used for service injection pump timing, a different target zone is required (-.25 to -.75).