Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA2008RX-8 TOURING, 1.3 N, RC4AELREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMSYMPTOM TROUBLESHOOTING [ENGINE)ENGINE CONTROL SYSTEM OPERATION INSPECTIONPURGE CONTROL SYSTEM INSPECTION
2008 Mazda RX-8 Touring, 1.3 N, RC4AEL
Purge Control System Inspection
2008 Mazda RX-8 Touring, 1.3 N, RC4AELSECTION Purge Control System Inspection
- Start the engine.
- Disconnect the vacuum hose at quick release connector.
- Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
- If there is vacuum, inspect the following:
- Wiring harness and connectors (Purge solenoid valve-PCM terminal 2P)
- Purge solenoid valve
- If there is vacuum, inspect the following:
- Warm up the engine to the normal operating temperature.
- Stop the engine.
- Connect the M-MDS or equivalent to the DLC-2 and verify that the DTC P0443 is shown. Perform the DTC inspection. (See DTC TABLE )
- Turn the ignition switch to the ON position.
- Select the ECT PID.
- Verify that the engine is warmed up completely.
- If the engine is not warmed up completely, perform the ECT sensor inspection.
- Set the vehicle on the dynamometer or chassis roller.WARNING:
- When the dynamometer or chassis roller is operating, there is a possibility that the operator may come into contact with or be caught up in the rotating parts, leading to serious injuries or death. When performing work while the dynamometer or chassis roller is operating, be careful not to come into contact with or be caught up in any of the rotating parts.
- Drive the vehicle at an engine speed of approx. 2000 rpm for 30 s or more .
- Put a finger to the purge solenoid valve and verify that there is no vacuum applied during above step 2.
- If there is no vacuum, inspect the following:
- Wiring harness and connector (Main relay - purge solenoid valve-PCM terminal 2P)
- Purge solenoid valve
- MAF, APP1, APP2, TP_REL and LOAD PIDs
- If there is vacuum, inspect the following:
- Vacuum hose (Purge solenoid valve-charcoal canister)
- If there is no vacuum, inspect the following:
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.