Mazda 323 1988 Workshop Manual page 314

4B
FUEL SYSTEM
Fuel line Pressure
1. Start the engine and run it idle.
2. Move the lever on the adapter as shown in the
figure.
3. Check the fuel line pressure.
Fuel line pressure: Approx. 167-216 kPa
(1.7-2.2 kg/cm', 24.1-31.3 psi)
4. If not within specification, check the vacuum hose.
5. Disconnect a vaccum hose of pressure regulator.
6. Check the fuel line pressure.
Fuel line pressure: 240-279 kPa
(2.46-2.65
kg/cm2, 34.6-40.5 psi)
7. If not within specifications, replace the pressure
regulator.
8. Connect the vacuum hose to pressure regulator.
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