The engine is difficult to start, the exhaust pipe is a large number of black smoke, is the result of incomplete combustion of diesel fuel.
The reason
Poor quality diesel oil.
Air intake is not smooth, air filter clogging.
Fuel injection timing adjustment.
The Baotou North Benz parts of injector valve sealing is poor, a drop of oil leakage.
The injection pressure is too low.
The oil supply is too large, deterioration of combustion.
The cylinder pressure is low, poor atomization.
The diagnosis and treatment methods
Determine whether the diesel quality meets the requirements.
Check whether the air filter in the north of Baotou.
Check whether the fuel injection timing is premature. Turn the engine and insert the camshaft timing pin, which is located in a cylinder compression TDC, check the fuel pump cam shaft locking pin can be inserted, if you cannot insert that timing is wrong, need to be adjusted.
The school pump, check the fuel pump fuel supply is too large.
Check the fuel injection pressure and spray Baotou North Benz parts of the injector is good, injector can not drip phenomenon.
The use of oil method check each cylinder work.
If the above tests were normal, but the fault still, should have no abnormal check cylinder pressure and piston, piston ring and cylinder clearance, whether cylinder gasket destroyed or valve is not tightly closed.