Page 296 - Foton Workshop Manual - Sauvana

12B-6 ENGINE MECHANICAL - ENGINE MECHANICAL

Malfunction Possible cause Reference
symptom

The density of
CO and HC is
high when it is 1.The engine is not warmed-up fully Warm-up engine, test high idle speed firstly
in idle speed
1.Incorrect quantitative method Use reliable quantitative method

2.The vehicle state Overhaul the vehicle
3.Engine status Check and maintain the engine

4.Thermostat damaged Change coolant temperature sensor
5.The temperature sensor of the
Abnormal of fuel coolant is damaged Replace coolant temperature sensor
consumption
6.The fuel injector leaks oil Replace the fuel injector
7.The control valve of the oil pressure Change the fuel pump
is damaged

8.The oxygen sensor is damaged Change oxygen sensor
9.ECM is damaged Replace ECM

Trouble light
irregularly on/ 1.The connector of the ignition system Check all the connection terminals of the
off during the is not in good connection ignition system and reconnect the connectors
running time

Page 296