Mazda RX-8 Workshop Manual page 755

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2011 - RX-8 - Engine
NO.15 EMISSION COMPLIANCE [13B-MSP]
15 EMISSION COMPLIANCE
DESCRIPTION
POSSIBLE
Fails emissions test.
Vacuum lines leakage or blockage
Cooling system malfunction
Spark plug malfunction
Leakage from intake manifold
Erratic signal from eccentric shaft position sensor
Inadequate fuel pressure
Exhaust system clogging
Fuel tank ventilation system malfunction
Charcoal canister damage
Air cleaner element clogging or restriction
Throttle body malfunction
Jet air mixing system line blockage
Spark leakage from high-tension leads
Improper air/fuel mixture ratio control operation
Catalyst converter malfunction
Engine internal parts malfunction
Excessive carbon is built up in combustion chamber
Improper engine compression
Engine internal malfunction