MX-5 Miata L4-1.8L DOHC (1996)
Fuel Pressure Regulator: Testing and Inspection
System Inspection
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. To prevent this, always complete the "Fuel Line Safety Procedures".
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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
FUEL LINE PRESSURE 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. To prevent this, always complete the "Fuel Line Safety Procedures".
