NO.22 VIBRATION CONCERNS (ENGINE) [MZI-3.5]
DESCRIPTION AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DIAGNOSTIC INDEX
z
Spark plug looseness
z
Intake-air system leakage
No
Go to the next step.
5
Is a rapping or roar noise present?
Yes
Inspect looseness for followings:
z
Dynamic dumper
z
Intake-air system
z
Exhaust system
No
Go to the next step.
6
Is a knocking noise present?
Yes
Go to symptom troubleshooting "No.13
Knocking/pinging".
(See
NO.13 KNOCKING/PINGING-
ACCELERATION/CRUISE [MZI-
3.5]
.)
No
If the noise comes from the engine
internal, inspect for friction gear, timing
chain or MLA noise.
7
z
Verify test results.
{
If normal, return to diagnostic index to service any additional symptoms.
(See
ENGINE SYMPTOM TROUBLESHOOTING [MZI-3.5]
.)
{
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-3.5]
.)
22
VIBRATION CONCERNS (ENGINE)
DESCRIPTION
z
Vibration from under hood or driveline
POSSIBLE CAUSE
z
Loose attaching bolts or worn parts
z
Components malfunction such as worn parts
STEP INSPECTION
RESULTS ACTION
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:37 AM
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