Operation & Maintenance Manual for WP7 Euro
Ⅵ
Vehicle Diesel Engine
13
3.4 High fuel consumption
Causes
Troubleshooting
1. Air inlet pipe is blocked
(air filter is blocked)
Check the air filter and air inlet pipe to ensure
smooth air-inlet
2 Exhaust back pressure is high
Check the exhaust pipe and braking valve to
ensure smooth exhausting
3. Poor fuel quality
Replace the fuel as specified
4. Fuel pipe is blocked
Check and remove the blockage
5. Fuel pipe leaks
Check the leaking location and replace the
pipe to ensure good sealing performance
3.5 Dark smoke in the exhaust
Causes
Troubleshooting
1. Air inlet is blocked or exhaust
back pressure is high
Check the inlet and exhaust pipe to ensure the
pipes are not blocked
2. Poor fuel quality
Wash and replace
3. Wrong valve timing or injection
timing
Adjust as required
4. Injection pump injects too much
fuel
Check and adjust (by specialized operator)
5.
The pressure of turbocharging
system is insufficient
Check if there is any leakage with the pipes
and joints
6. Malfunction of turbocharger
Check and replace the turbocharger assembly
7. Intercooler is damaged or there
is leakage
Replace or repair
8. Wrong working point of smoke
limiter
Re-adjust (by specialized operator)
