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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 491 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM BP, BP WITH TC))NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISENOTES
2010 Mazda 5 Sport, 2.3 L, Standard

No.12 Lack/Loss Of Power-Acceleration/Cruise: Notes

2010 Mazda 5 Sport, 2.3 L, StandardSECTION Notes
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [BP, BP WITH TC] DESCRIPTION & POSSIBLE CAUSE

12 Lack/loss of power-acceleration/cruise
DESCRIPTION 
  • Performance is poor under load (i.e., power down when climbing hills).
POSSIBLE CAUSE 
  • Improper A/C system operation
  • Erratic signal or no signal from CMP sensor
  • Air leakage from intake-air system parts
  • Purge solenoid malfunction
  • EGR valve malfunction
  • Brake dragging
  • Erratic signal from CKP sensor
  • Low engine compression
  • Vacuum leakage
  • Poor fuel quality
  • Spark leakage from high-tension leads
  • ACL restriction
  • PCV valve malfunction
  • Improper valve timing due to jumping out of timing belt
  • Restriction in exhaust system
  • Intermittent open or short in FP circuit
  • Inadequate fuel pressure
  • FP mechanical malfunction
  • Fuel leakage from fuel injector
  • Fuel injector clogged
  • Intermittent open or short of MAF sensor, TP sensor and VSS
  • Automatic transmission malfunction
  • Clutch slippage
  • Improper VTCS operation
  • Variable valve timing system malfunction
    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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION".

        (See BEFORE SERVICE PRECAUTION )

        (See AFTER SERVICE PRECAUTION )

    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.