Mazda 323 1988 Workshop Manual page 238

4A
FUEL SYSTEM
FUEL PRESSURE
Note
a) When inspecting fuel 'pressure, use SST.
(Refer to page 4A--36)
b)Warm up the engine to normal operating
temperature.
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Injection Pressure
1, Set the lever on the adapter as shown in the figure.
To pressure regulator
2. Run the engine and measure the injection pres-
sure at various speeds.
Injection pressure: Approx. 240-279 kPa
(2.45-2.85 kg/cm', 34.8-40.5 psi)
3. If not within specification, check the fuel pump pres-
sure, fuel line pressure, and injector (Refer to page
4A-41)
Fuel Pump Pressure
1. Connect the terminals of the test connector (yel-
low connector) with a jumper wire.
2. Turn the ignition switch ON to operate the fuel
pump.
-'
3. Move the lever on the adapter as shown in the
figure.
4. Check the fuel pump pressure.
Fuel pump pressure: 441-588 kPa
(4.5-6.0 kg/cm*, 64.0-85.3 psi)
5. If the fuel pump pressure is not within specifica-
tion, check the followings.
No pressure
Fuel pump operation (Refer to page 4A-40)
Low pressure
Fuel pump feeding capacity (Refer to page
4A-40)
High pressure
Replace the fuel pump
6. After checking the fuel pump pressure, disconnect
the jumper wire from the test connector.
4A-38