Specifications

TROUBLESHOOTING
F217
F
NO.19 EXHAUST SMOKE
A6E398018881W21
Diagnostic procedure
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
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.
• Excessive fuel pressure
• Improper engine compression
• Injector fuel leakage
• Ignition system malfunction
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair
procedures. Read following warnings before performing fuel system services:
•
••
• 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 REPAIR PROCEDURE and AFTER REPAIR PROCEDURE described in this
manual.
(See F17 BEFORE REPAIR PROCEDURE.)
(See F17 AFTER REPAIR PROCEDURE.)
Caution
•
••
• Disconnecting/connecting quick release connector without cleaning it may possibly cause
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
STEP INSPECTION RESULTS ACTION
1 What color is smoke coming from exhaust
system?
Blue Burning oil is indicated.
Go to next step.
White Water in combustion is indicated.
Go to Step 3.
Black Rich fuel mixture is indicated.
Go to Step 4.
2 Remove and shake PCV valve.
Does PCV valve rattle?
Yes Inspect for following:
• Damaged valve guide, stems or valve seals
• Blocked oil drain passage in cylinder head
• Piston ring is not seated, seized or worn.
• Damaged cylinder bore
If other drivability symptoms are present, return to
diagnostic index to service any additional symptoms.
No Replace PCV valve.
3 Does cooling system hold pressure? Yes Inspect for following:
• Cylinder head gasket leakage
• Intake manifold gasket leakage
• Cracked or porous engine block
If other drivability symptoms are present, return to
diagnostic index to service any additional symptoms.
No Inspect for cause.
4 Inspect for following:
• Air cleaner restriction
• Collapsed or restricted intake-air system
• Restricted fuel return line
Are all items okay?
Yes Go to next step.
No Service as necessary.
Repeat Step 4.
5 Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed?
Yes DTC is displayed:
Go to appropriate DTC test.
No No DTC is displayed:
Go to next step.