No.16 High Oil Consumption/Leakage - Mazda 2002 6 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 excess amount of liquid fuel present in
canister?
9 Is there restriction in exhaust 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 index 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 excessive.
• 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:
• External leakage
• Proper dipstick
• Proper engine oil viscosity
Are all items okay?
3 Verify test results.
• If okay, return to diagnostic index 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 next step.
No Inspect following:
• High-tension leads
• Ignition coil and connector
Yes Go to next step.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
Yes Go to next step.
No Replace PCV valve.
Yes Replace charcoal canister.
No Inspect fuel tank vent system.
Then, go to next step.
Yes Inspect exhaust 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 next 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