1991 LEXUS SC400 Service Repair Manual

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Page 2425 of 4087

LEXUS SC400 1991 Service Repair Manual 6. DISCONNECT FUEL RETURN PIPE FROM FUELPRESSURE REGULATOR Remove the union bolt and two gasket, and disconnect the return pipe from the pressure regulator. HINT: wPut a suitable container or shop to

Page 2426 of 4087

LEXUS SC400 1991 Service Repair Manual (e) Connect the fuel return pipe to the pressure regulatorwith new two gaskets and the union bolt. Torque: 35 N Vm (360 kgf Vcm, 26 ft Vlbf) (f) Tighten the lock nut. Torque: 29 N Vm (300 kgf Vcm,

Page 2427 of 4087

LEXUS SC400 1991 Service Repair Manual 4. INSTALL UPPER HIGH±TENSION CORD COVER(a) Fit portion A of the upper high±tension cover, matchingit with the top of the lower high±tension cord cover. (b) Push the front side of the high±ten

Page 2428 of 4087

LEXUS SC400 1991 Service Repair Manual Injectors ON±VEHICLE INSPECTION INSPECT INJECTOR RESISTANCE(a) Remove the engine wire covers and throttle body.(See steps 1 to 8 and 13 on pages FI±27 to 30) (b) Disconnect the injector connecto

Page 2429 of 4087

LEXUS SC400 1991 Service Repair Manual COMPONENTS FOR REMOVAL AND INSTALLATION FI±49EFI SYSTEM ± Fuel System (Injectors) WhereEverybodyKnowsYourName

Page 2430 of 4087

LEXUS SC400 1991 Service Repair Manual REMOVAL OF INJECTORS (See Components on page FI±49) 1. REMOVE AIR INTAKE CHAMBER (See steps 1 to 16 on pages FI±27 to 32) 2. DISCONNECT FUEL INLET HOSE FROM LH DELIVERY PIPE Remove the pulsation

Page 2431 of 4087

LEXUS SC400 1991 Service Repair Manual (d) Disconnect the two engine wire connectors from theconnector bracket on the front side of the LH delivery pipe. (e) Disconnect the eight injector connector. 7. REMOVE FUEL RETURN PIPE (a) Re

Page 2432 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF INJECTORS 1. INSPECT INJECTOR INJECTIONCAUTION: Keep injector clear of sparks during the test. (a) Disconnect the fuel inlet hose from the fuel tube. (b) Connect SST (hose) to the fu
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