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Home >> Suzuki >> 1998 >> Sidekick JS, 2D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Tests W/Codes - Tests (1.6L) >> Diagnostic Tests >> DTC P0300: Random Misfire Or DTC P0301, P0302, P0303 Or P0304: Cylinders No. 1-4 Misfire

DTC P0300: Random Misfire Or DTC P0301, P0302, P0303 Or P0304: Cylinders No. 1-4 Misfire

  1. Check ignition spark and spark plug at cylinder in question. Repair as necessary. If a strong Blue spark is present at ignition wire and spark plug is okay, go to next step.
  2. Using a mechanic's stethoscope, check each fuel injector for a clicking sound while cranking engine. If sound is not heard from all 4 injectors, go to next step. If sound is heard from all 4 injectors, go to step 4).
  3. Check fuel injector harness and connections. Using a fuel injector tester (noid-light), check injector control signal at each harness connector. Repair as necessary and retest system.
  4. Check ignition timing. See ADJUSTMENTS article. Adjust as necessary and retest system. If ignition timing is okay, check EGR system for proper operation. See DTC P0400  : EXHAUST GAS RECIRCULATION (EGR) FLOW MALFUNCTION. Repair as necessary. If EGR operation is okay, check engine mechanical condition. See appropriate article in ENGINES section.
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