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NO.19 EXHAUST SMOKE [MZI-3.7] NO.19 EXHAUST SMOKE (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES (See PCM REMOVAL/INSTALLATION [MZI-3.7] .) 19 EXHAUST SMOKE DESCRIPTION Blue, black, or white smoke from exhaust system POSSIBLE CAUSE Blue smoke (Burning oil): PCV valve malfunction Engine internal oil leakage Cooling system malfunction (coolant loss) Engine internal coolant leakage Air cleaner restriction Intake-air system is collapsed or restricted. Fuel return line is restricted. Excessive fuel pressure Improper engine compression Injector fuel leakage Ignition system malfunction WARNING: The following troubleshooting flow chart contains fuel system diagnosis and Fuel vapor is hazardous. It can easily ignite, causing serious injury Fuel line spills and leakage are dangerous. Fuel can ignite and cause (See BEFORE SERVICE PRECAUTION [MZI-3.7] .) (See AFTER SERVICE PRECAUTION [MZI-3.7] .)
2008 Mazda CX-9 Grand Touring 2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
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