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Home >> Nissan-Datsun >> 1998 >> Sentra Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Controls - System/Component Tests) >> Fuel System >> Fuel Control >> Fuel Injector
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Fuel Injector

WARNING: This page is about a different car, the 1998 Infiniti Q45 and 1998 Infiniti I30. However, it is still accessible from the selected car via links, so may be relevant.
  1. With engine idling, individually disconnect injector harness connectors. Each injector should produce an equal RPM drop.
  2. With engine cranking or while manually rotating crankshaft position sensor (harness connected with ignition on), listen for clicking or feel for vibration, indicating injectors are triggering. If injectors are not triggering, check power and ground circuits and crankshaft position sensor signal to PCM.
  3. Disconnect fuel injector harness connector. Measure resistance between fuel injector terminals. If resistance is 10-14 ohms, go to next step. If resistance is not 10-14 ohms, replace fuel injector.
  4. Check for injector leaks by removing injector fuel rail. Keep fuel hose and all injectors connected to rail. Turn ignition switch to RUN position. DO NOT  start engine. Observe injector tips for leakage. If injectors drip, replace faulty injectors.
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