MX-5 Miata L4-1.8L DOHC (1996)
Fuel Pressure: Testing and Inspection
Fuel Pressure Hold Test
FUEL PRESSURE HOLD INSPECTION
WARNING: Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also
irritate skin and eyes.
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Disconnect the negative battery cable.
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Install a fuel pressure gauge between the fuel pipe and the fuel main hose. (Install clamps as shown.)
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Connect the negative battery cable.
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Connect data link connector terminals F/P and GND by using a jumper wire.
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Turn the ignition switch to ON for 10 sec. to operate the fuel pump.
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Turn the ignition switch to OFF and disconnect the jumper wire.
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Observe the fuel pressure after 5 min.
Fuel pressure: More than 147 kPa (21 psi)
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If not as specified, perform the following inspections.
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Fuel pump hold pressure
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Pressure regulator hold pressure
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Fuel injector fuel leakage