Supra Sport Roof L6-2997cc 3.0L DOHC MFI (1998)
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
(h) Remove the TOYOTA hand-held tester from the DLC3.
(i) Start the engine.
(j) Measure the fuel pressure at idle.
Fuel pressure: 301-347 kPa (3.1-3.5 kgf/Sq. cm, 44-50 psi)
If pressure is not as specified, check the fuel pressure regulator.
(k) Stop the engine.
(l) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
Fuel pressure: 147 kPa (1.5 kgf/Sq. cm, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.
(m)After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from
splashing. SST 09268-45014
(n) Install the fuel inlet pipe to the fuel pipe support with 2 new gaskets and the union bolt.
Torque: 29 N.m (300 kgf.cm, 21 ft.lbf)
(o) Reconnect the negative (-) terminal cable to the battery.
(p) Check for fuel leaks.