Mazda MX-5 Miata Sport 2007 Manual page 2000

2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
system.Is cruise control
system normal?
14 Inspect the front HO2S.
(See FRONT
HEATED OXYGEN
SENSOR (HO2S)
INSPECTION [LF] .)
Is the front HO2S
normal?
15 Inspect the evaporative
purge hose between the
fuel tank and the purge
valve.
Does fuel flow into
evaporative purge hose?
16 Disconnect the vacuum
hose between the purge
solenoid valve and the
intake manifold from
the purge solenoid
valve side.
Plug opening end of
vacuum hose.
Drive the vehicle.
Does the engine
condition improve?
17 Visually inspect the
CMP sensor and
projections of camshaft
pulley.
Are CMP sensor and
projections of camshaft
pulley normal?
18 Inspect the EGR
system.
(See EGR CONTROL
SYSTEM
INSPECTION .)
Is the EGR system
normal?
19 Is the engine
compression correct?
2007 Mazda MX-5 Miata Sport
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Go to the next step.
Replace the front HO2S.
(See FRONT HEATED
OXYGEN SENSOR (HO2S)
REMOVAL/INSTALLATION
[LF] .)
Inspect the check valve (two-
way).
(See FUEL TANK
INSPECTION [LF] .)
Go to the next step.
Go to the next step.
Inspect if the purge solenoid
valve is stuck open
mechanically.
Inspect the evaporative emission
control system.
Go to the next step.
Go to the next step.
Replace the malfunctioning part.
Go to the next step.
Replace the malfunctioning part.
Inspect the following:
Valve timing

Internal transaxle part

(AT)
Clutch (MT)
