Plug opening end of
vacuum hose.
Drive the vehicle.
Does the engine
condition improve?
No
Go to the next step.
15
Visually inspect the
CMP sensor and
projections of camshaft
pulley.
Are the CMP sensor
and projections of
camshaft pulley
normal?
Yes
Go to the next step.
No
Replace the malfunctioning part.
16
Inspect EGR system.
(See
EGR CONTROL
SYSTEM
INSPECTION
.)
Is EGR system normal?
Yes
Go to the next step.
No
Replace the malfunctioning part
according to EGR control
system operation inspection
results.
17
Inspect the variable
valve timing control
system operation.
(See
VARIABLE
VALVE TIMING
CONTROL SYSTEM
OPERATION
INSPECTION
.)
Does the variable valve
timing control system
function properly?
Yes
Go to the next step.
No
Repair or replace the
malfunctioning part according to
variable valve timing control
system inspection results.
18
Is the engine
compression correct?
Yes
Inspect the following:
Valve timing
Internal transaxle
components (AT)
Clutch (MT)
Brake system for dragging
No
Inspect for cause.
19
Verify test results.
If normal, return to diagnostic index to service any additional
symptoms.
(See
ENGINE SYMPTOM TROUBLESHOOTING [LF]
.)
If malfunction remains, inspect related Service Bulletins and/or On-
line Repair Information and perform repair or diagnosis.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:10 PM
Page 74
© 2005 Mitchell Repair Information Company, LLC.