1991 LEXUS SC400 Service Repair Manual

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Page 1905 of 4087

LEXUS SC400 1991 Service Repair Manual Throttle Body FI±66 ± Air Induction System (Thrott\ le Body)EFI SYSTEM WhereEverybodyKnowsYourName

Page 1906 of 4087

LEXUS SC400 1991 Service Repair Manual ON±VEHICLE INSPECTION 1. INSPECT THROTTLE BODY(a) Remove the throttle body cover.w Remove the mounting cap nut. w Loosen the two bolts, and remove the throttle body cover. (b) Check that the thr

Page 1907 of 4087

LEXUS SC400 1991 Service Repair Manual D. Check and adjust DP setting speed(a) Maintain the engine at 2,500 rpm. (b) Plug the VTV hole with your finger. (c) Release the throttle valve. (d) Check that the DP is set. DP setting speed:

Page 1908 of 4087

LEXUS SC400 1991 Service Repair Manual COMPONENTS FI±69EFI SYSTEM ± Air Induction System (Throttle Body) WhereEverybodyKnowsYourName

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LEXUS SC400 1991 Service Repair Manual REMOVAL OF THROTTLE BODY (See Components on page FI±69) 1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF BATTERY CAUTION: Work must be started after approx. 20 se- conds or longer from the time the ig

Page 1910 of 4087

LEXUS SC400 1991 Service Repair Manual 6. REMOVE UPPER HIGH±TENSION CORD COVER(a) Remove the two mounting bolts. (b) Disconnect the front side claw groove of the cord coverfrom the claw of the lower cover, and remove the cord cover.

Page 1911 of 4087

LEXUS SC400 1991 Service Repair Manual (c) Remove the two bolts and two nuts, disconnect thethrottle body from the air intake chamber. (d) Disconnect the following hoses, and remove the throttle body: (1) PCV hose from throttle body (

Page 1912 of 4087

LEXUS SC400 1991 Service Repair Manual INSPECTION OF THROTTLE BODY 1. CLEAN THROTTLE BODY(a) Using a soft brush and carburetor cleaner, clean the cast parts. (b) Using compressed air, clean all the passages and apertures. NOTICE: To pr
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