SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 12 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM L3))NO. 14 POOR FUEL ECONOMY [L3]NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

No. 14 Poor Fuel Economy [L3]: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different variant/trim than selected.
POSSIBLE CAUSE DESCRIPTION

14 POOR FUEL ECONOMY
DESCRIPTION  Fuel economy is unsatisfactory.
POSSIBLE CAUSE 
  • Contaminated air cleaner element
  • Variable intake air system malfunction
  • Engine cooling system malfunction
  • Improper ATF level (ATX)
  • Weak spark
  • Poor fuel quality
  • Erratic or no signal from CMP sensor
  • Clutch slippage (MTX)
  • Variable tumble system malfunction
  • Improper variable valve timing control system operation
  • Improper coolant level
  • Inadequate fuel pressure
  • Spark plug malfunction
  • PCV valve malfunction
  • Brake dragging
  • Improper valve timing due to jumping out of timing chain
  • Contaminated MAF sensor
  • Improper engine compression
  • Exhaust system clogging
    WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing 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" described in this manual.

      (See BEFORE REPAIR PROCEDURE [L3, AJ] ).

      (See AFTER REPAIR PROCEDURE [L3, AJ] ).

    RENDER: 1.0x

    NO RELATED

    Recommended Tools & Savings

    Use the Manual With the Right Hardware

    Pair factory procedures with proven DIY tools so the instructions are easier to execute.

    Affiliate disclosure: We may earn a commission at no extra cost to you.

    Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

    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.