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Home >> Chevrolet >> 1996 >> Tahoe 2D Utility, 6.5 S >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 6.5L V8 Diesel - VIN [F & S] >> Adjustments >> Injection Pump Timing Adjustment >> Adjustment Procedure

Adjustment Procedure

  1. Connect Tech 1 scan tool. Run engine at idle until warm. Leave engine running. Select OUTPUT TEST/INJ PUMP. Select TDC TIME SET.
  2. If engine does not stall, go to next step. If engine stalls, loosen pump nuts. Slightly rotate pump toward driver's side of vehicle. Tighten nuts. Repeat step 1).
    NOTE: To observe MEASURED INJ TIM, engine must be running. MEASURED INJ TIM will fluctuate; this is normal.
  3. In TDC TIME SET mode, the value of DESIRED INJ TIM displayed on Tech 1 will be "0". Observe MEASURED INJ TIM value (this is the current timing). If timing is not 3.5 degrees BTDC, shut engine off. Loosen pump nuts. Rotate pump as necessary (one mm = 2 degrees). Tighten pump nuts. Start engine. Observe MEASURED INJ TIM value. If necessary, adjust again.
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