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Home >> Isuzu >> 1985 >> I-Mark 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Testing >> Injection Nozzles >> Opening Pressure
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Opening Pressure

  1. Pump pressure up slowly to note opening pressure. Nozzle opening pressure is 1706 psi (120 kg/cm2 ) for I-Mark models, on P'UP models 1493 psi (105 kg/cm2 ).
  2. Check injector nozzles for leakage by installing in tester and maintaining 284 psi (20 kg/cm2 ) pressure. If any leakage is evident, injector must be cleaned or replaced.
Fig 1: Injection Nozzle Spray Patterns
G34632