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HOMESERVICE MANUALSMAZDA2008TRIBUTE S SPORT, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 401 (SYMPTOM TROUBLESHOOTING (ENGINE CONTROL SYSTEM) AJ)NO.30 SPARK PLUG CONDITIONNOTES
2008 Mazda Tribute s Sport, 4WD

No.30 Spark Plug Condition: Notes

2008 Mazda Tribute s Sport, 4WDSECTION Notes
WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
SPARK PLUG CONDITION - DESCRIPTION AND POSSIBLE CAUSE

30 Spark plug condition
DESCRIPTION 
  • Incorrect spark plug condition
POSSIBLE CAUSE 
NOTE:
  • Inspecting spark plugs condition can determine whether problem is related to a specific cylinder or to all cylinders.
Wet/carbon is stuck on specific plug: 
  • Spark-Weak, not visible
  • Air/fuel mixture-Excessive fuel injection volume
  • Compression-No compression, low compression
  • Faulty spark plug
Grayish white with specific plug: 
  • Air/fuel mixture-Insufficient fuel injection volume
  • Faulty spark plug
Wet/carbon stuck on all plugs: 
  • Spark-Weak
  • Air/fuel mixture-Too rich
  • Compression-Low compression
  • Clogging in intake/exhaust system
Grayish white with all plugs: 
  • Air/fuel mixture-Too lean
    WARNING:
    • The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
      • 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" described in this manual.

        (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.