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Home >> Chevrolet >> 1981 >> Luv 2.2L Eng VIN S, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Diesel Fuel Injection >> Testing >> Injection Nozzles
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Injection Nozzles

  1. Remove nozzles and connect injection nozzle tester. Pump tester lever about 30 times a minute to observe spray pattern. See Fig 1. If spray is faulty, replace injector.
    Fig 1: Injection Nozzle Spray Patterns
    G09345378Courtesy of NOT AVAILABLE
  2. Pump pressure up slowly to note opening pressure. If not within 1705-1850 psi (120-130 kg/cm2 ) for I-Mark models or 1495-1635 psi (105-115 kg/cm2 ) on LUV and P'UP models, injector must be replaced.
    NOTE: When replacing injection nozzles, install parts in this order: ridged washer (with Blue side toward nozzle), gasket, then nozzle holder.