T100 Pickup 2WD L4-164.4 2693cc 2.7L DOHC (3RZ-FE) (1995)
Fuel Pressure Regulator: Testing and Inspection
CHECK FUEL PRESSURE.
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Check that the battery voltage is above 12 volts.
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Disconnect the negative (-) terminal cable from the battery.
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Remove the union bolt and 2 gaskets, and disconnect the fuel inlet pipe from the delivery pipe.
HINT:
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Put a suitable container or shop rag under the delivery pipe.
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Slowly loosen the union bolt.
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Install the fuel inlet pipe and SST 09268-45012 (pressure gauge) to the delivery pipe with 3 gaskets and SST (union bolt).
Torque: 29 Nm (22 ft lb)
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Wipe off any splattered gasoline.
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Connect the TOYOTA hand-held tester to the DLC3.
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Turn the ignition switch ON and TOYOTA hand-held tester main switch ON.
NOTICE: Do not start the engine.
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Select the active test mode on the TOYOTA hand-held tester.
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Please refer to the TOYOTA hand - held tester operator's manual for further details.
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If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.
(See step 2 in fuel pump inspection)
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Reconnect the negative (-) terminal cable to the battery.
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Turn the ignition switch ON.
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Measure the fuel pressure.
Fuel pressure: 265-304 kPa (38-44 psi)
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check these parts;
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Fuel hoses and connections
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Fuel pump
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Fuel filter
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Fuel pressure regulator
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Injectors
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Remove the TOYOTA hand-held tester.
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Start the engine.
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Disconnect the vacuum sensing hose from the fuel pressure regulator, and plug the hose end.
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Measure the fuel pressure at idle.
Fuel pressure: 265-304 kPa (38-44 psi)