Honda CBR600F4i Series Service Manual page 489

TROUBLESHOOTING
Possible cause
'
11. Check fo r engine overheating - - - - -- - Overhcoting
I
Not overheating
12. Accelerol'1 o, run at high speed - - - - - - Engine
knocks-----►
t
Engine does nut knock
Coolant level low
Fan
1110101
not working (fau lty fan
motor switch)
Thermostat stuck close
Excessive carbon build-up i n com-
bustion chamher
Use of poor quolity fuel
• Wrong type of fuel
Clutch slipping
Worn piston and cylinder
Wrong type of fue l
Excessive carbon build-up in com
bustion chamber
Ignition li111i 11y to advanced (faulty
ECM)
Lean fuel mixture
POOR PERFORMANCE AT LOW AND IDLE SPEED
Possible cause
1. Check ignitio n timing - - -- -
- - - - Incorrect --------,►
1
Correct
t
2. Check the starter valve synchronization - - - - Incorrect
I
Correct
i
3. Inspect the fuel flow - - -- -
- - -- Abnormal - - -- - --
1
Normal
t
4.
Inspect the fuel injector - -- -- - --
Abnorml!I - - - -- --
1
Normal
t
5. Check for leaks in the intake pipe
- -----Leaking _ __ _ _ __ ...,.
I
Not leak
t
6. Perform spark test - - -- - -- - - -- ·- Weak or intermittent
l ...
Good spark
• Improper ignition timing
• Sec section 5
• Faulty pressure reaul,otor (Section
5)
• Sec section 5
Loose insulator clamp
Dllmllged insulator
Faulty spark plug
• Faulty carbon or wet fouled spark
pl ug
Faulty ECM
Faulty ignition coil
Fa ulty engine stop switch
F;iulty ignition pulse generator
Faulty ignition switch
Loose or disconnected ignition sys-
tem wires
22-3