Mazda RX8 - Page 26

• Vacuum leak
• Proper fuel quality (e.g.
proper octane,
contamination,
winter/summer blend)
• Blockage at intake-air
system (between MAF
sensor and intake ports)
• Loose bands on intake-air
system hoses
• Cracks in intake-air
system
• Air cleaner restriction
• Jet air mixing system air
passage (clogging or
leakage)
• MAF sensor installation
Are all the items normal?
No
Service if necessary.
Repeat Step 2.
Yes
Go to the applicable DTC inspection.
(See DTC TABLE .)
3
Connect the WDS or equivalent
to the DLC-2.
Turn the ignition switch to the ON
position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
No Go to the next step.
Yes Go to the next step.
4
Connect the WDS or equivalent
to the DLC-2.
Access the ECT PID.
Inspect the readings on both the
ECT PID and the temperature
gauge on the instrument cluster
readings.
Does the ECT PID indicate the
same temperature as the gauge
readings?
No
If temperature gauge is in the normal range
but the ECT PID is not the same as the
temperature gauge reading, inspect the ECT
sensor.
(See ENGINE COOLANT
TEMPERATURE (ECT) SENSOR
INSPECTION .)
If the temperature gauge on instrument
cluster indicates the cold range but the ECT
PID is normal, inspect the temperature gauge
and the sending unit.
(See Water temperature gauge .)
5 Is the engine overheating?
Yes
Go to the symptom troubleshooting "No.17
Cooling system concerns − Overheating".
(See NO.17 COOLING SYSTEM
CONCERNS-OVERHEATING .)
(w) RX8-Engine Troubleshooting
Page 26