THROTTLE BODIES
7-9
EAS26980
CHECKING THE INJECTORS
1. Check:
• Injectors
Damage → Replace.
EAS26990
CHECKING THE THROTTLE BODIES
1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle bod-
ies as a set.
2. Check:
• Fuel passages
Obstructions → Clean.
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a. Wash the throttle bodies in a petroleum-
based solvent.
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with compressed
air.
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EAS3D81005
CHECKING THE FUEL PRESSURE
1. Check:
• Fuel pressure
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a. Remove the sub-fuel tank cover.
Refer to “GENERAL CHASSIS” on page 4-1.
b. Disconnect the fuel hose “1” from the fuel
pump.
WARNING
EWA3D81001
Cover fuel hose connections with a cloth
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to
spurt out when removing the hoses.
c. Connect the fuel pressure adapter “3” be-
tween the fuel hose “1” and fuel pump “2”.
d. Connect the pressure gauge “4” to the fuel
pressure adapter “3”.
e. Start the engine.
f. Measure the fuel pressure.
Faulty → Replace the fuel pump.
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EAS27030
ADJUSTING THE THROTTLE POSITION
SENSOR
NOTE:
Before adjusting the throttle position sensor, the
engine idling speed should be properly adjusted.
1. Check:
• Throttle position sensor
Refer to “CHECKING THE THROTTLE PO-
SITION SENSOR” on page 8-101.
2. Adjust:
• Throttle position sensor angle
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a. Connect the throttle position sensor coupler
to the throttle position sensor.
b. Connect the digital circuit tester to the throttle
position sensor.
1
Pressure gauge
90890-03153
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
Fuel pressure
324 kPa (46.1 psi) (3.24 kg/cm²)
• Positive tester probe →
yellow “1”
• Negative tester probe →
black/blue “2”
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
1
2
3
4
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