NO.9 FAST IDLE/RUNS ON [MZI-3.5]
air system components.
{
If system is normal, go to
the next step.
15
Disconnect the vacuum hose between
the purge solenoid valve and the intake
manifold from purge solenoid valve
side.
Plug opening end of vacuum hose.
Start the engine.
Does the engine condition improve?
Yes
Check if purge solenoid valve is stuck
open mechanically.
Inspect EVAP control system.
No
Go to the next step.
16
Remove and shake the PCV valve.
Does the PCV valve rattle?
Yes
Go to the next step.
No
Replace the PCV valve.
17
Visually inspect the exhaust system
part.
Is there any deformed exhaust system
part?
Yes
Replace the suspected part.
No
Go to the next step.
18
Visually inspect the CMP sensor and
teeth of camshaft.
Are the CMP sensor and teeth of
camshaft normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
19
Inspect variable valve timing control
system operation.
(See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION [MZI-
3.5]
.)
Does variable valve timing control
system function properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning
part.
20
Is engine compression correct?
Yes
Inspect the valve timing.
No
Inspect for causes.
21
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]
.)
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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© 2005 Mitchell Repair Information Company, LLC.
