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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 624 (SYMPTOM TROUBLESHOOTING [ENGINE))NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISENOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

No.13 Knocking/Pinging/Detonation-Acceleration/Cruise: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE DESCRIPTION & POSSIBLE CAUSE TABLE

13 KNOCKING/PINGING/DETONATION - ACCELERATION/CRUISE
DESCRIPTION  A sound is produced when the air/fuel mixture is ignited by something other than the spark plug (e.g., hot spot in combustion chamber).
POSSIBLE CAUSE 
  • Air suction at intake-air system
  • Poor fuel quality
  • Inadequate fuel pressure
  • Pressure regulator (integrated in fuel pump unit) malfunction
  • Fuel pump relay stuck closed
  • Fuel injector malfunction (clogging, lack of injection amount)
  • Erratic signal from eccentric shaft position sensor
  • Improper ignition timing control (ECT, IAT, MAF and knock signals to PCM)
  • Incorrect spark plug heat range
  • Improper operation of eccentric shaft bypass valve
  • Engine overheating due to cooling system malfunction
  • Excessive carbon is built up in combustion chamber
  • Inadequate engine compression
    • Engine internal malfunction
    • Abnormal engine oil condition (viscosity, deterioration)
    • Low oil pressure
    • Excessive fuel pressure
    • Air mixed in oil malfunction
    • Metering oil pump malfunction
      • Leakage or clogging in oil pipe
      • Leakage or clogging in oil nozzle
WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: 
  • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. 
  • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE". 

    (See  BEFORE REPAIR PROCEDURE  ) 

    (See  AFTER REPAIR PROCEDURE  ) 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.