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Home >> Nissan-Datsun >> 1990 >> 300ZX Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Hesitation >> Under Normal Conditions

Under Normal Conditions

  1. Check spark plug for improper gap or fouling.
  2. Disconnect exhaust gas sensor and monitor change in driveability. If it improves, replace sensor. If not, go to step 5).
  3. Remove canister purge line from intake and test drive vehicle.
  4. Ensure there are no vacuum leaks into intake system.
  5. Enter self-diagnostic Mode II and monitor exhaust gas sensor operation.
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