KYMCO KYMCO Movie S 125i, Service Manual, Page: 27 / 196

1
. GENERAL INFORMATION Movie S 125i
1-24
POOR PERFORMANCE AT LOW AND IDLE SPEED
Possible cause
1. Check ignition timing Incorrect Improper ignition timing
Correct
2. Inspect the fuel flow Abnormal Faulty pressure regulator
Normal
3. Inspect the fuel injector Abnormal Faulty injector
Normal
4. Check for leaks in the intake pipe Leaking Loose insulator clamp
Damage insulator
No leak
5. Perform spark test Weak or intermittent spark 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
Good spark