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 

F–17 BEFORE REPAIR PROCEDURE

.)

2. Disconnect the negative battery cable.
3. Remove the fuel injectors together with the fuel distributor with the fuel hose connected. (See 

F–28 FUEL 

INJECTOR REMOVAL/INSTALLATION

.)

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 

F–17 AFTER REPAIR PROCEDURE

.)

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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 

F–17 BEFORE REPAIR PROCEDURE

.)

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 

F–17 AFTER REPAIR PROCEDURE

.)

Atomization

1. Inspect atomization pattern.

• If the atomization is faulty, replace the fuel injector.

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F–34

FUEL SYSTEM 

PRESSURE REGULATOR INSPECTION

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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

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1. Remove and install the pressure regulator.(See 

F–28 FUEL INJECTOR REMOVAL/INSTALLATION

.)

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PULSATION DAMPER INSPECTION

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1. Complete the “BEFORE REPAIR PROCEDURE”. (See 

F–17 BEFORE REPAIR PROCEDURE

.)

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 

F–17 AFTER REPAIR PROCEDURE

.)

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EXHAUST SYSTEM 

F–35

F

EXHAUST SYSTEM INSPECTION

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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

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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