Mazda 6. Manual — part 118
F–8
ENGINE TUNE-UP
End Of Sie
IGNITION TIMING INSPECTION
A6E390802000W01
Note
• Ignition timing is not adjustable.
• Ignition timing verification requires WDS or equivalent.
1. Turn off the electrical loads.
2. Warm up the engine as follows.
(1) Start the engine.
(2) Maintain the engine speed at approx. 3,000 rpm until the cooling fans start to operate.
(3) Release the accelerator pedal.
(4) Wait until the cooling fans stop.
3. Verify that the ignition timing (WDS: SPARKADV PID) is within the specification using WDS or equivalent.
Ignition timing
Approx. BTDC 10 degree
4. Verify that ingestion timing advances when the engine speed increases gradually.
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IDLE SPEED INSPECTION
A6E390802000W02
Note
• Ignition timing is not adjustable.
• Ignition timing verification requires WDS or equivalent.
1. Turn off the electrical loads.
2. Warm up the engine as follows.
(1) Start the engine.
(2) Maintain the engine speed at approx. 3,000 rpm until the cooling fans start to operate.
(3) Release the accelerator pedal.
(4) Wait until the cooling fans stop.
3. Verify that the idle speed (WDS: RPM PID) is within the specification using WDS or equivalent.
Idle speed (L8 engine model)
Idle speed (LF engine MTX model)
ENGINE TUNE-UP
Condition
Engine speed (rpm)*
1
No load
650—750
Electrical loads*
2
ON
650—750
P/S ON
700—800
A/C ON and refrigerant
pressure switch (middle) OFF
700—800
A/C ON and refrigerant
pressure switch (middle) ON
700—800
Condition
Engine speed (rpm)*
1
No load
600—700
Electrical loads*
2
ON
650—750
P/S ON
650—750
A/C ON and refrigerant
pressure switch (middle) OFF
700—800
A/C ON and refrigerant
pressure switch (middle) ON
700—800
ENGINE TUNE-UP
F–9
F
Idle speed (LF engine ATX model)
Idle speed (L3 engine model)
*1 : Excludes temporary idle speed drop just after the electrical loads are turned on.
*2 : Blower motor is operating at high speed. Headlight switch is turned on. Rear window defroster switch is turned
on. Cooling fans are operating.
End Of Sie
IDLE MIXTURE INSPECTION
A6E390802000W03
1. Turn off the electrical loads.
2. Warm up the engine as follows.
(1) Start the engine.
(2) Maintain the engine speed at approx. 3,000 rpm until the cooling fans start to operate.
(3) Release the accelerator pedal.
(4) Wait until the cooling fans stop.
3. Verify that the idle speed and ignition timing are within the specification. (See
(See
F–8 IGNITION TIMING INSPECTION
4. Insert an exhaust gas analyzer to the tailpipe.
5. Verify that the CO and HC concentrations are within the regulation.
End Of Sie
Condition
Engine speed (rpm)*
1
No load
650—750
Electrical loads*
2
ON
650—750
P/S ON
650—750
A/C ON and refrigerant
pressure switch (middle) OFF
650—750
A/C ON and refrigerant
pressure switch (middle) ON
700—800
Condition
Engine speed (rpm)*
1
No load
600—700
Electrical loads*
2
ON
650—750
P/S ON
650—750
A/C ON and refrigerant
pressure switch (middle) OFF
700—800
A/C ON and refrigerant
pressure switch (middle) ON
700—800
F–10
INTAKE-AIR SYSTEM
VACUUM HOSE ROUTING DIAGRAM
A6E391020030W01
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INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
A6E391013000W01
Warning
• When the engine and intake-air system are hot, they can badly burn. Turn off the engine and wait
until they are cool before removing the intake-air 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 the “Fuel Line
Safety Procedure”. (See
.)
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
INTAKE-AIR SYSTEM
A6E3910W034
INTAKE-AIR SYSTEM
F–11
F
4. Complete the “AFTER REPAIR PROCEDURE”. (See
.)
.
8
1
7
2
3
4
9
13
14
10
19
18
15
16
12
11
17
R
N·m {kgf·cm, in·lbf}
8.0—11.5
{82—117, 71—101}
8.0—11.5
{82—117, 71—101}
8.0—11.5
{82—117, 71—101}
20—30
{204—305,
177—265}
5—7 {51—71, 45—61}
20—30
{204—305, 177—265 }
5
6
12
L8, LF ENGINE MODELS
0.55—0.85
{5.6—8.6, 4.9—7.5}
2.5—3.4
{26—34, 23—30}
2.5—3.4
{26—34, 23—30}
0.8—1.0
{8.2—10.0, 7.1—8.8}
RUBBER MOUNTS
(FRAME SIDE)
RUBBER MOUNT
(ENGINE SIDE)
A6E3910L001
1
Air cleaner cover
2
Air cleaner element
3
F–12 Air Cleaner Case Installation Note
4
F–12 Resonance Chamber Removal Note
5
VAD control solenoid valve (L3)
6
VAD shutter valve (L3)
7
Mass air flow sensor
8
Vacuum hose (purge solenoid valve)
(See
F–12 Vacuum Hose (Purge Solenoid Valve)
)
9
Purge solenoid valve
10
Air hose
11
Throttle body
12
Variable tumble control solenoid valve
13
VIS control solenoid valve (L3)
14
Fuel injector connector
15
Plastic fuel hose
(See
F–28 Plastic Fuel Hose Removal Note
)
(See
F–30 Plastic Fuel Hose Installation Note
16
Fuel distributor
17
Intake manifold
18
IAC valve
19
VAD check valve (L3)
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