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Home >> Isuzu >> 1986 >> Trooper II LS, 2.2 U >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Adjustments >> Injection Pump Timing

Injection Pump Timing

  1. Check that notch in pump flange is in line with notched line on front plate. Set No. 1 cylinder at TDC of compression stroke. Remove injection pump pulley cover (right half of timing belt cover) to ensure timing marks are aligned. SeeFigure .
  2. Disconnect injection pipe from pump (using back-up wrench) and remove distributor head screw. Install Timing Gauge Tool (J-29763 or J-28827) and set lift approximately .04" (1 mm) from plunger.
  3. Turn engine until No. 1 cylinder is 45-60° BTDC. Calibrate dial indicator to zero. Turn crankshaft pulley slightly in both directions and make sure zero reading does not change.
  4. Turn crankshaft in normal direction of rotation until timing mark (15° BTDC on Federal P'UP, 13° BTDC on Trooper II) on crankshaft pulley is in line with indicator. See Fig 1 . Dial indicator should show .020" (0.5 mm). If not, loosen pump bolts and rotate pump slightly to obtain proper timing.
Fig 1: P'UP Timing Mark Identification
G34646