LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 1987 >> Trooper II LS, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Adjustments >> Injection Pump Timing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Injection Pump Timing

  1. Ensure notch in pump flange is in line with notch in front bracket. 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. See Figure .
  2. Disconnect injection pipe from pump (using back-up wrench) and remove distributor head screw from high pressure plug assembly. Install Timing Gauge (J-29763 or J-28827) and set lift approximately .04" (1.0 mm) from plunger.
  3. Turn engine until No. 1 cylinder is 45-60 degrees BTDC. Set dial indicator to zero. Turn crankshaft pulley slightly in both directions and ensure zero reading does not change.
  4. Turn crankshaft in normal direction of rotation until timing mark (15 degrees BTDC on Federal P'UP, 13 degrees BTDC on Calif. P'UP and 10 degrees BTDC on Trooper II) on crankshaft pulley is in line with indicator. See Fig 1 . Dial indicator should show .020" (.50 mm). If not, loosen pump bolts and rotate pump slightly to obtain proper timing.
Fig 1: Timing Mark Identification (P'UP)
G34646Courtesy of ISUZU MOTOR CO.
scientia non olet · About LEMON Manuals