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)
2008 Mazda RX-8 Touring, 1.3 N, RC4AEL
Symptom Troubleshooting [Engine)
2008 Mazda RX-8 Touring, 1.3 N, RC4AELSECTION Symptom Troubleshooting [Engine)
- Foreword
- Engine Symptom Troubleshooting
- Quick Diagnostic Chart
- No.1 Melting Of Main Or Other Fuses
- No.2 Mil Comes On
- No.3 Will Not Crank
- No.4 Hard To Start/Long Crank/Erratic Start/Erratic Crank
- No.5 Engine Stalls-After Start/At Idle
- No.6 Cranks Normally But Will Not Start
- No.7 Slow Return To Idle
- No.8 Engine Runs Rough/Rolling Idle
- No.9 Fast Idle/Runs On
- No.10 Low Idle/Stalls During Deceleration
- No.11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges
- No.12 Lack/Loss Of Power-Acceleration/Cruise
- No.13 Knocking/Pinging/Detonation-Acceleration/Cruise
- No.14 Poor Fuel Economy
- No.15 Emission Compliance
- No.16 High Oil Consumption/Leakage
- No.17 Cooling System Concerns-Overheating
- No.18 Cooling System Concerns-Runs Cold
- No.19 Exhaust Smoke
- No.20 Fuel Odor (In Engine Compartment)
- No.21 Engine Noise
- No.22 Vibration Concerns (Engine)
- No.23 A/C Does Not Work Sufficiently
- No.24 A/C Is Always On Or A/C Compressor Runs Continuously
- No.25 A/C Does Not Cut Off Under Wide Open Throttle Conditions
- No.26 Exhaust Sulphur Smell
- No.27 Fuel Refill Concerns
- No.28 Fuel Filling Shut Off Issues
- No.29 Spark Plug Condition
- Intermittent Concern Troubleshooting
- Engine Control System Operation Inspection
- Input Signal System Investigation Procedure
- Notes
- Finding unusual signals
- Locating the source of unusual signals
- Hall or piezo-electric type (TP sensor, APP sensor, APV position sensor and BARO sensor)
- Investigate the input signal system for hall or piezo-electric type
- Investigate the standard power supply system for hall or piezo-electric type
- Investigate the GND system for hall or piezo-electric type
- Hot wire type (fuel tank level sensor and mass air flow (MAF) sensor)
- Investigate the GND system for hot wire type
- Investigate the input signal system for hot wire type
- Investigate the electrical supply system for hot wire type
- Thermistor type (IAT sensor and ECT sensor)
- Investigate the input signal system for thermistor type
- Investigate the GND system for thermistor type
- Main Relay Operation Inspection
- Intake Manifold Vacuum Inspection
- Drive-by-wire Control System Inspection
- Variable Dynamic Effect Intake-air (VDI) Operation Inspection
- Secondary Shutter Valve (SSV) Operation Inspection
- Auxiliary Port Valve (APV) Control Inspection
- Fuel Injector Operation Inspection
- Fuel Pump Operation Inspection
- Fuel Pump Control System Inspection
- Fuel Pump Speed Control Operation Inspection
- Spark Test
- Cooling Fan Control System Inspection
- Secondary Air Injection (AIR) System Inspection
- Metering Oil Pump Control Inspection
- Purge Control System Inspection
- A/C Cut-off Control System Inspection
- Variable Fresh Air Duct (VFAD) Control System Operation Inspection (13B-MSP (High Power))
- Evaporative Emission (EVAP) System Leak Inspection
- Rotor Balance Test
- Input Signal System Investigation Procedure
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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.