Mazda Protege 5. Manual — part 145

FUEL SYSTEM

01–14–5

01–14

AFTER REPAIR PROCEDURE

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Warning

••••

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. When installing the fuel hose, observe “Fuel Leakage Inspection” described below.

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.

Caution

••••

Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the
specified terminal only.

1. Short the DLC terminal F/P to the body GND

using a jumper wire.

2. Turn the ignition switch to ON to operate the fuel

pump.

3. Pressurize the system this way for at least 5 min

to be sure of no leakage.

•

If there is fuel leakage, inspect the fuel hoses,
hose clamps, and fuel pipe sealing surface
and replace if necessary.

4. After repairing, assemble the system and repeat

Steps 1 to 3.

End Of Sie

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FUEL SYSTEM

01–14–6

FUEL PRESSURE INSPECTION

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Warning

••••

Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death. Fuel
can also irritate skin and eyes. To prevent this, always complete the “BEFORE REPAIR
PROCEDURE”. (See 01–14–4 BEFORE REPAIR PROCEDURE.)

Caution

••••

Disconnecting/connecting the quick release connector without cleaning it may possibly cause
damage to the fuel pipe and quick release connector. Always clean the quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign materials.

1. Disconnect the battery negative cable.
2. Disconnect the quick release connector from the pulsation damper as follows:

(1) Push apart the lock clip and unlock it.

(2) Lift the tab on the blue locking coupler until

the fuel line can be released.

(3) Pull the fuel hose straight back.

Note

•

The blue stopper may be removed from the
quick connector. Be sure not to loose it.
Reinstall it to the quick release connector
before reconnecting the fuel line.

•

The orange locking coupler has two internal
locking tabs which retrain the pulsation
damper pipe. Be sure that the tab on the
locking coupler is rotated until it stops to
release two internal locking tabs.

3. Push the SST quick release connector into the

fuel distributor and fuel main hose into the SST
until a click is heard.

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FUEL SYSTEM

01–14–7

01–14

4. Turn the lever on the SST as shown.

5. Connect the battery negative cable.

Caution

••••

Connecting to the wrong DLC terminal
may possibly cause a malfunction.
Carefully connect to the specified
terminal only.

6. Short the DLC terminal F/P to the body GND

using a jumper wire.

7. Turn the ignition switch to ON and measure the

fuel line pressure.

•

If the pressure is higher than specified,
inspect the fuel pump maximum pressure. If
specified, inspect fuel return hose or the pressure regulator is clogged.

•

If the pressure is lower than specified, proceed to Step (1).

Fuel line pressure

270—310 kPa {2.7—3.2 kgf/cm

2

, 39—45 psi}

(1) Inspect change in the fuel line pressure while turning the lever as shown.

•

If the fuel line pressure quickly increases, inspect the pressure regulator.

•

If fuel line pressure gradually increases, inspect the fuel pump maximum pressure.

•

If the fuel pump maximum pressure is normal, inspect for clogging between the fuel pump and the
pressure regulator.

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FUEL SYSTEM

01–14–8

8. Turn off the ignition switch and disconnect the

jumper wire

9. Observe the fuel pressure after 5 min.

•

If the fuel hold pressure is lower than
specified, proceed to sptep (1).

Fuel hold pressure

More than 150 kPa {1.5 kgf/cm

2

, 22 psi}

(1) Inspect changes in the fule line pressure

while turning the lever as shown.

•

If the fuel line pressure holds, replace the
pressure regulator. (See 01–14–21 FUEL
INJECTOR REMOVAL/INSTALLATION.)

•

If the fuel line pressure does not hold,
inspect the fuel leaks from the fuel line
and the fuel injector.

10. Disconnect the SST.

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