Fuel Control System

When disconnecting the high pressure fuel line, a large amount of gasoline will spill out, so observe the following:
1. Place a suitable container under the fuel fitting to be disconnected.
2. Slowly loosen the fitting.
3. Disconnect the lines.
4. On a flare type nut fitting, cap the fitting connections using a rubber type plug.
5. When connecting the flare type nut or union type bolt onto the high pressure line fitting, proceed as follows:
a. On union type bolt, always use a new seating gasket. Hand tighten the union bolt first, then torque attachment to 22 ft. lbs.
b. On a flare type nut, apply a thin coat of clean engine oil to the flared end and tighten the attaching nut. Using tool 09631-22020 or equivalent, tighten nut to 22 ft. lbs.
6. Note the following when removing or installing injectors:
a. Never reuse an O-ring.
b. When placing an O-ring on the injector, ensure not to damage it in any way.
c. Lubricate the O-ring with spindle oil or gasoline before installation. Do not use engine, gear or brake oil.
7. Confirm that there are fuel leaks. With engine OFF, turn ignition switch to the ON position. Short terminals Fp and B+ on the check connector. On 2VZ-FE engines the check connector is located, near the brake master cylinder. On 3S-GTE engines the check connector is located near the passenger side fender/strut tower. On 3VZ-E engines the check connector is located near the No. 2 relay block. On 4A-GZE engines the check connector is located near the intercooler assembly. When the fuel return hose is pinched, fuel pressure within the high pressure line will rise to approximately 57 psi. With hose pinched, ensure that there is no fuel leakage. Always pinch the hose, do not bend it.