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POOR PERFORMANCE AT LOW AND IDLE SPEED
1.
Pilot
Screw
Insp
ection
Check carburetor pilot screw
adjustmen
t.
Is the
adjustment correct?
NO
- See page 5-19
YES
- GO TO STEP 2.
2
.
Intake
Air
Leak Inspection
Check for leaking carburetor insulator.
Is there
leaking?
YES
_
.
l
oose
carburetor insu
lator ba nds
•
Damaged insulato
r
NO
-
GO TO STEP 3.
3
.
Spark Test
Perform spark test.
Is there
weak or intermittent
spark?
YES
-
.
Faulty spark p lug
•
Fouled
spark plug
•
Loose or disconnected ignition system wi res
•
Broken o
r
shorted spark plug wire
•
Faulty ignition coil
•
Faulty ignition pulse
generator
•
Faulty engi ne stop switch
•
Faulty ignition switch
•
Faulty engine control module (ECM)
NO
- GO TO STEP 4.
4.
Ignition Timing Inspection
Check the ignition timing.
Is the
ignition timing correct?
NO
_.
Faulty engine contro
l
module (ECM)
•
Faulty ignition pulse
generator
YES
- Faulty automatic tra nsmission system
TROUBLESHOOTING
27-5
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