Mazda 3 - 12 Lack;Loss of Power-Acceleration;Cruise [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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486
19
Inspect the EGR system.
(SeeEGR Control System Inspection.)
Is the EGR system normal?
Yes
Go to the next step.
No
Replace or replace the malfunctioning parts.
20
Is engine compression correct?
(See COMPRESSION INSPECTION
[Z6].)
Yes
Inspect the following:
• Valve timing.
(See Timing Chain Installation Note.)
• Engine mounts
• Check valve (two-way)
• Internal transaxle part (ATX)
• Clutch (MTX)
No
Inspect for cause.
21
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING [Z6].)
• If malfunction remains, inspect related Service information perform repair or diagnosis.
- If vehicle repaired, troubleshooting completed.
- If vehicle not repaired or additional diagnostic information not available, replace the
PCM.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [Z6].)
NO.12 LACK/LOSS OF POWER-
ACCELERATION/CRUISE [Z6]
B3E010318881W45
12
LACK/LOSS OF POWER - ACCELERATION/CRUISE
DESCRIPTION
Performance is poor under load (such as 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
• Restriction in intake-air system
• Intake air temperature too hot
• Improper variable intake-air control operation
• Improper variable tumble control operation
• Purge control solenoid malfunction