6-24
FUEL SYSTEM AND THROTTLE BODY
Step 2 • Warm up the engine as follows: Summer: approx. 5 min at idle r/min Winter: approx. 8 min at idle r/min • Water temperature should be more than 80 °C (176 °F) and then wait 30 second. • Then ISC valve automatically is set at throttle body synchronization position. • Check for difference of vacuum between #1 and #2. • Adjust the throttle valve synchronization and idling speed at 900 r/min by turning the air screw it necessary. # Avoid dirt drawn into the throttle body while running the engine without air cleaner chamber. Dirt drawn into the engine will damage the internal engine parts. NOTE: Always set the engine rpm at 900 r/min. • If the adjustment is not yet correct, remove each air screw and clean them with a spray-type carburetor cleaner and blow dry with a compressed air. • Also, clean the air screw passageways. NOTE: * Slowly turn the air screw in clockwise and count the number of turns until the screw is lightly seated. * Make a note of how many turns were made so the screw can be reset correctly after cleaning. Step 3 Repeat the procedures of Step 2.
THROTTLE POSITION SENSOR (TPS) SETTING After all adjustments are completed, check or adjust the TPS setting condition. (Refer to page 5-20 for TPS setting procedure.)
#1
#2