Fuel Pump Maximum Pressure - Mazda MX-5 1990 Workshop Manual

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05UOFX-149
05UOFX-151
05UOFX-152
05UOFX-153
F-108
FUEL SYSTEM
4. Connect diagnosis connector terminals F/P and GND with
a jumper wire.
5. Turn the ignition switch ON for 10 sec. to operate the fuel
pump.
6. Turn the ignition switch OFF and disconnect the jumper wire.
7. Observe the fuel pressure after 5 min ..
Fuel pressure;
More than 343 kPa (3.5 kg/cm
2
,
50 psi)
8. If not as specified, replace the fuel pump.
Fuel pump maximum pressure
Warning
• Before performing the following operation, relase
the fuel pressure from the fuel system to reduce the
possibility of injury or fire. (Refer to page F-101.)
1. Disconnect the negative battery terminal.
2. Connect a fuel pressure gauge to the fuel main pipe and
plug the outlet of the fuel pressure gauge as shown. (Install
clamps as shown.)
3. Connect the negative battery terminal.
4. Connect diagnosis connector terminals F/P and GND with
a jumper wire.
S. Turn the ignition switch ON to operate the fuel pump.
6. Measure the pump maximum pressure.
Fuel pump maximum pressure:
441-589 kPa (4.6-6.0 kg/cm2, 64-85 psi)
7. Turn the ignition switch OFF and disconnect the jumper wire.
8. If not as specified, replace the fuel pump.
I
Replacement
Warning
• Before performing the following procedures, release
the fuel pressure from the fuel system to reduce the
possibility of injury or fire. (Refer to page F-101.)
• When replacing the fuel system parts, keep sparks,
cigarettes, and open flames away from the fuel.