Page 294 - Foton Workshop Manual - Sauvana

12B-4 ENGINE MECHANICAL - ENGINE MECHANICAL

Malfunction Possible cause Reference
symptom

1.The intake system is not expedite for Clean inlet channel, air filter element
gas intake
Clean the detecting hole of the temperature
2.The hole of the temperature sensor sensor for the intake pressure and replace
for the intake pressure is blocked
the sensor is necessary

3.Air control shutter can not be fully Adjust throttle limit screws, ensure the throttle
opened is fully opened
4.The fuel injector is blocked Clean or replace the fuel injector

The engine 5.The spark plug is polluted or is Clean the spark plug and adjust the
accelerates incorrect in its clearance clearance
poorly or dully Clean the oil supply system and replace the
6.Oil supply system is polluted
fuel filter

7.The fuel pump fails Change the fuel pump

8.The cylinder head gasket is not Replace the cylinder head gasket
sealed fully
9.The valve is burned, distorted or has Replace the valve
the pezograph

Overhaul exhaust system and ternary
10.Air intake system is blocked
catalytic converter
1.Air intake system is blocked Clean inlet channel, air filter element

2.Air control shutter can not be fully Adjust throttle limit screws, ensure the throttle
opened is fully opened
Overhaul exhaust system and ternary
3.Exhaust system is blocked
Underpowered catalytic converter
of engine 4.Resistance force of the parts on the
motive power transmission system Overhaul related parts and components of
motive power transmission system
is too large
5.Engine is over heating Overhaul engine cooling system

6.The fuel injector is blocked Clean or replace the fuel injector
1.The electric leakage of the high- Reconnect all the connectors and change the
The vehicle idles voltage lines damaged parts
while driving
2.The fuel injector is blocked. Clean or replace the fuel injector

Chattering when 1.The electric leakage of the high- Reconnect all the connectors and change the
speed up voltage lines damaged parts

1.Fuel is not meet the standard Change the fuel
Knocking
2.Engine is over heating Overhaul engine cooling system

Page 294