NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZI-3.7]
NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE (MZI-3.7) DETECTION CONDITIONS
AND POSSIBLE CAUSES
18 Is the engine compression correct?
Yes
Inspect the following:
z
Valve timing
z
Internal transaxle part
z
Engine mounts
z
Check valve (two-way)
No
Inspect for cause.
19
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See
SYMPTOM DIAGNOSTIC INDEX [MZI-3.7]
.)
{
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
Information and perform repair or diagnosis.
z
If vehicle is repaired, troubleshooting completed.
z
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See
PCM REMOVAL/INSTALLATION [MZI-3.7]
.)
12
LACK/LOSS OF POWER-ACCELERATION/CRUISE
DESCRIPTION
Performance is poor under load (such as power down when climbing hills).
z
Improper A/C system operation
z
Erratic signal or no signal from CMP sensor
z
Air leakage from intake-air system parts
z
Restriction in intake-air system
z
Intake air temperature too hot
z
Improper operation of electronic throttle control system
z
Purge control solenoid malfunction
z
Brake dragging
z
Erratic signal from CKP sensor
z
Low engine compression
z
Vacuum leakage
z
Poor fuel quality
z
Erratic signal to ignition coil
z
Engine overheating
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:05 AM
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