No.16 High Oil Consumption/Leakage - Mazda 6 2002 Workshop Manual

STEP
5 Is strong blue spark visible at each disconnected
high-tension lead while cranking engine?
6 Install fuel pressure gauge between fuel pipe
and fuel distributor.
Start engine and run it at idle.
Measure fuel line pressure at idle.
Is fuel line pressure correct at idle?
(See F–20 FUEL LINE PRESSURE
INSPECTION)
7 Remove and shake PCV valve.
Does PCV valve rattle?
8 Inspect for fuel saturation inside charcoal
canister.
Is ecess amount of liquid fuel present in
canister?
9 Is there restriction in ehaust system?
10 Inspect threeway catalytic converter.
(See F–41 THREE-WAY CATALYTIC
CONVERTER (TWC)
Is threeway catalytic converter okay?
11 Verify test results.
• If okay, return to diagnostic inde to service any additional symptoms.
• If malfunction remains, replace PCM.
End Of Sie

NO.16 HIGH OIL CONSUMPTION/LEAKAGE

16 HIGH OIL CONSUMPTION/LEAKAGE
DESCRIPTION Oil consumption is ecessive.
• PCV valve malfunction
• Improper dipstick
POSSIBLE CAUSE
• Improper engine oil viscosity
• Engine internal parts malfunction
Diagnostic procedure
STEP
1 Remove and shake PCV valve.
Does PCV valve rattle?
2 Inspect for following:
• Eternal leakage
• Proper dipstick
• Proper engine oil viscosity
Are all items okay?
3 Verify test results.
• If okay, return to diagnostic inde to service any additional symptoms.
• If malfunction remains, replace PCM.
End Of Sie
F–214
TROUBLESHOOTING
INSPECTION
INSPECTION.)
INSPECTION
RESULTS
Yes Inspect for following:
• Spark plugs malfunction
• Improperly installed CMP sensor
• Damage of trigger wheel on camshaft
• Open or short circuit on CMP sensor
• Open or short circuit between CMP sensor and
PCM terminal 2J or 2M
Repair or replace malfunctioning parts.
If okay, go to net step.
No Inspect following:
• High-tension leads
• Ignition coil and connector
Yes Go to net step.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
Yes Go to net step.
No Replace PCV valve.
Yes Replace charcoal canister.
No Inspect fuel tank vent system.
Then, go to net step.
Yes Inspect ehaust system.
No Inspect EGR system.
(See F–233 EGR Control System
Yes Inspect EGR system.
(See F–233 EGR Control System
No Replace threeway catalytic converter.
RESULTS
Yes Go to net step.
No Replace PCV valve.
Yes Inspect internal engine parts such as valves, valve
guides, valve stem seals, cylinder head drain passage,
and piston rings.
No Service as necessary.
Repeat Step 2.
ACTION
Inspection.)
Inspection.)
A6E398018881W18
ACTION