Poor Performance At Low And Idle Speed - KYMCO Movie S 125i Service Manual

1
. GENERAL INFORMATION

POOR PERFORMANCE AT LOW AND IDLE SPEED

1. Check ignition timing
Correct
2. Inspect the fuel flow
Normal
3. Inspect the fuel injector
Normal
4. Check for leaks in the intake pipe
No leak
5. Perform spark test
Good spark
Incorrect
Abnormal
Abnormal
Leaking
Weak or intermittent spark
Movie S 125i
Possible cause
Improper ignition timing
Faulty pressure regulator
Faulty injector
Loose insulator clamp
Damage insulator
Faulty spark plug
Faulty carbon or wet fouled spark
plug
Faulty ECU
Faulty ignition coil
Faulty ignition pulse generator
Faulty ignition switch
Loose or disconnected spark plug
wires
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