(d) Disconnect the water bypass hose (from the water outlet) from the throttle body. (e) Remove the throttle body and gasket. INSTALLATION HINT: Use a new gasket. INSPECTION OF THROTTLE BODY 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 prevent deterioration, do not clean the throttle position sensor, dashpot and throttle opener. 2. INSPECT THROTTLE VALVE (a) Disconnect the throttle opener vacuum hose from the throttle body. (b) Apply vacuum to the throttle opener. (c) Check that there is no clearance between the throttle stop screw and throttle lever when the throttle valve is fully closed. (d) Reconnect the throttle opener vacuum hose to the throttle body. Throttle Stop Screw Vacuum No Clearance Disconnect Throttle Lever Throttle Position Sensor 1. INSPECT THROTTLE POSITION SENSOR (See on–vehicle inspection) Ohmmeter E2 IDL VTA VC 2. IF NECESSARY, ADJUST THROTTLE POSITION SENSOR (a) Loosen the 2 set screws of the sensor. Pry Disconnect P12011 P11978 P12047 P12010 209131 P11463