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Home >> Nissan-Datsun >> 1990 >> 300ZX Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Backfire >> Intake
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Engine Controls - Tests W/O Codes: Backfire: Intake

  1. Check spark plug for improper gap or fouling.
  2. Ensure there are no vacuum leaks into intake system.
  3. Check for intake valve deposits.
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