2005 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

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

LACK/LOSS OF POWER-ACCELERATION/CRUISE - DESCRIPTION AND POSSIBLE CAUSE

12 Lack/loss of power-acceleration/cruise
DESCRIPTION 
  • Performance is poor under load (e.g. 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
  • IMRC malfunction
  • Purge control solenoid malfunction
  • EGR valve malfunction
  • Brake dragging
  • Erratic signal from CKP sensor
  • Low engine compression
  • Vacuum leakage
  • Poor fuel quality
  • Erratic signal to ignition coil
  • Air cleaner restriction
  • PCV valve malfunction
  • Improper valve timing due to jumping out of timing belt
  • Restriction in exhaust system
  • Intermittent open or short in fuel pump circuit
  • Inadequate fuel pressure
  • Fuel pump mechanical malfunction
  • Fuel leakage from fuel injector
  • Fuel injector clogging
  • Intermittent open or short of MAF sensor, TP sensor and VSS
  • ATX 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.

        (See BEFORE REPAIR PROCEDURE .)

        (See AFTER REPAIR PROCEDURE .)
Factory Service Tools

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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.

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