Specifications

47
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（I）Enginemalfunction
Malfunction
phenomenon
Malfunction
system
Reason Solvingmethod
Poorenginepower Fuelsupplysystem
fault
1. Throttlebodyinletblockag e
2. Airfilterisdirty
3. Intakemanifoldleak

4. Toomuchoil
5. Blockedinjector
6. Lowfuelpressure
Clean
Cleanorchange
Tightenorchange
gasket
Drainextraoil
Cleanorchange
Adjustorchangefuel
pump
Electricalparts
problem
1. Dirtysparkplug
2. Incorrectsparkpluggap
3. Ignitionswitchproblem
4. ECUproblem
5. Magnetoproblem
Cleanorchange
Changeoradjust
Change
Change
Change
Mechanical
problem
1. Incorrectvalveadjustment
2. Weakvalvespring
3. Faultyexhaust
4. Cylinderwornout
5. PistonRingwornout
6. Burnedorleakingvalve
7. Wornrockerarmorcamshaft
Adjustvalves
Change
Change
Change
Change
Change
Change
Engineoverheats Fuelsystemfault 1. Octaneratingistoolow
2. Fuelpassageblocked
3. Fuelpumpproblem
Usethecorrectfuel
Cleanthefuelpassage
Change
ElectricSystem
problem
1. Incorrectignitiontiming
2. Sparkisweakornospark
Adjustignitiontiming
Checkignition
components
Intake,
combustion,or
exhaustproblems
1. Compressionleak
2. Airfilterisdirty
3. Cylinder,piston,orringsworn
out
4. Intakemanifoldleak

5. Blockageinexhaustsystem
Repair
Cleanorchangefilter
Repairorchange

Tightenorreplace
gasket
Repairorreplace
Enginecooling
system
1. Blockageincoolingsystem
2. AirinCoolingsystemorcoolant
islow
3. Waterpumpproblem
4. Impropercoolant
5. Faultythermostat
6. Faultyfanmotororfan
thermostatswitch
Clear
Releaseairandadd
coolant
Change
Change
Change
Change

Miscellaneous 1. Carbonbuilduponpiston
2. Improperoillevel
3. Incorrectoilused
Clean
Add
Drainandrefill

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