Tacoma Regular Cab 4WD V6-3.4L (5VZ-FE) (1997)
Fuel Pressure: Testing and Inspection
FUEL PRESSURE INSPECTION
CHECK FUEL PRESSURE
(a) Check the battery positive voltage is above 12 V.
(b) Disconnect the negative (-) terminal cable from the battery.
(c) Remove the 6 bolts and disconnect the No.2 timing belt cover.
(d) 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.
(e) Install SST (pressure gauge) to the delivery pipe with the 2 gaskets and SST (union and union bolt). SST 09268-45012
Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf)
(f) Wipe off any splattered gasoline.
(g) Connect the TOYOTA hand-held tester to the DLC3.
(h) Reconnect the negative (-) terminal cable to the battery.
(i) Turn the ignition switch ON.
(j) Measure the fuel pressure.
Fuel pressure: 265 - 304 kPa (2.7 - 3.1 kgf/sq.cm, 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
(k) Disconnect the TOYOTA hand-held tester from the DLC3.