Mazda 6. Manual — part 124
F–32
FUEL SYSTEM
— No.2 cylinder fuel injector terminal A (harness-side) and power supply.
— No.3 cylinder fuel injector terminal A (harness-side) and power supply.
— No.4 cylinder fuel injector terminal A (harness-side) and power supply.
Fuel Leakage Inspection
Warning
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. Always carry out the following procedure with the engine stopped.
Note
• Perform the following test only when directed.
1. Complete the “BEFORE REPAIR PROCEDURE”. (See
.)
2. Disconnect the negative battery cable.
3. Remove the fuel injectors together with the fuel distributor with the fuel hose connected. (See
.)
4. Fasten the fuel injectors firmly to the fuel
distributor with wire.
5. Connect the negative battery cable.
Caution
• Connecting the wrong check connector
terminal may possibly cause
malfunction. Carefully connect the
specified terminal only.
6. Short the check connector terminal F/P to body
GND using a jumper wire.
7. Turn the ignition switch to ON position to operate
the fuel pump.
8. Tilt the fuel injectors approx. 60 degrees.
9. Verify that fuel leakage from the fuel injector
nozzles is within the specification.
• If not as specified, replace the fuel injector.
Fuel leakage
Less than 1 drop/2 minutes
10. Turn the ignition switch to LOCK position and
remove the jumper wire.
11. Complete the “AFTER REPAIR PROCEDURE”.
(See
A6E3912W009
A6E3912W037
A6E3912W010
FUEL SYSTEM
F–33
F
Volume Inspection
Warning
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. Always carry out the following procedure with the engine stopped.
Note
• If there is an after market fuel injector tester, perform the following test.
• If there is no an after market fuel injector tester, perform “Operation Test”, “Resistance Inspection”, and
“Fuel Leakage Test” to verify the fuel injector is okay or not.
1. Complete the “BEFORE REPAIR PROCEDURE”. (See
2. Disconnect the negative battery cable.
3. Remove the fuel injectors. (See
F–28 FUEL INJECTOR REMOVAL/INSTALLATION
4. Connect the fuel injector to the fuel injector tester.
5. Measure the injection volume of each fuel injector using a graduated container.
• If not as specified, replace the fuel injector.
Injection volume
L3: 61—71 ml {61—79 cc, 2.2—2.7 fl oz}/15 sec.
LF: 53—69 ml {53—69 cc, 1.9—2.4 fl oz}/15 sec.
L8: 48—63 ml {48—63 cc, 1.7—2.2 fl oz}/15 sec.
6. Turn the ignition switch to LOCK position and disconnect the jumper wire.
7. Complete the “AFTER REPAIR PROCEDURE”. (See
.)
Atomization
1. Inspect atomization pattern.
• If the atomization is faulty, replace the fuel injector.
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A6E3912W011
F–34
FUEL SYSTEM
PRESSURE REGULATOR INSPECTION
A6E391213280W01
Note
• Due to the adoption of the mechanical returnless fuel system, the pressure regulator cannot be inspected
separately.
1. Perform “FUEL LINE PRESSURE INSPECTION”. (See
F–20 FUEL LINE PRESSURE INSPECTION
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PULSATION DAMPER REMOVAL/INSTALLATION
A6E391220180W01
1. Remove and install the pressure regulator.(See
F–28 FUEL INJECTOR REMOVAL/INSTALLATION
.)
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PULSATION DAMPER INSPECTION
A6E391220180W02
1. Complete the “BEFORE REPAIR PROCEDURE”. (See
.)
2. Remove the pulsation damper. (See
F–34 PULSATION DAMPER REMOVAL/INSTALLATION
3. Visually inspect the pulsation damper for damage and cracks. Also verify that there is no extreme rust which
will cause fuel leakage.
• If either is observed, replace the pulsation damper.
4. Complete the “AFTER REPAIR PROCEDURE”. (See
.)
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EXHAUST SYSTEM
F–35
F
EXHAUST SYSTEM INSPECTION
A6E391440000W01
1. Start the engine and inspect each exhaust system component for exhaust gas leakage.
• If leakage is found, repair or replace as necessary.
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EXHAUST SYSTEM REMOVAL/INSTALLATION
A6E391440000W02
Warning
• When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait
until they are cool before removing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
EXHAUST SYSTEM
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