Tacoma 2WD V6-3.4L (5VZ-FE) (1995)
Fuel Pressure: Testing and Inspection
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Check the battery positive voltage is above 12 V.
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Disconnect the negative (-) terminal cable from the battery.
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Remove the 6 bolts, and disconnect the No.2 timing belt cover.
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Remove the union bolt holding the fuel pipe to the delivery pipe and gasket.
CAUTION:
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Put a shop towel under the delivery pipe.
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Slowly loosen the union bolt.
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Install SST 09268-45012 (pressure gauge) to the delivery pipe with the 2 gaskets and SST (union and union bolt).
Torque: 34.3 Nm (25 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.
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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 (2.7-3.1 kgt/cm2, 38-44 psi)
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If pressure is high, replace the fuel pressure regulator.
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If pressure is low, check these parts: