| POSSIBLE CAUSE |
Blue smoke (Burning oil):
- PCV valve malfunction
- Engine internal oil leakage
White smoke (Water in combustion):
- Cooling system malfunction (coolant loss)
- Engine internal coolant leakage
Black smoke (Rich fuel mixture):
- Air cleaner restriction
- Intake air system is collapsed or restricted
- Fuel return line is restricted
- PCM DTC is stored
- Excessive fuel pressure
- CMP sensor malfunction
- Ignition system malfunction
- Improper engine compression
- Improper fuel injection timing and amount
WARNING:
- The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION
.) (See AFTER SERVICE PRECAUTION
.)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
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