The electric injection nozzle emits black smoke after repairing, and how to repair the black smoke o

Landlord, adjust the oil supply of the big pump to a lesser extent, is it the wrong model of the mouth.

Influencing factors of black smoke failure The following factors may cause black smoke from diesel engines: 1. Problems with the fuel supply system (1) The advance angle of fuel injection is incorrect: the advance angle is large or small; (2) The plunger or outlet valve of the fuel injection pump is seriously worn; (3) Injector (mouth) problem:

Poor atomization of the fuel injector, jamming or serious dripping of oil or incorrect injection pressure; (4) There is a problem with the governor of the fuel injection pump; (5) The fuel supply of the fuel injection pump is too large; 2. Problems in the combustion system (1) Insufficient cylinder compression pressure: the piston top clearance is too large, the valve seal is not tight, and the valve seat ring is too deep; (2) The valve clearance is wrong; 3. Air intake system problems (1) Air filter quality problems; (2) Intake pipe resistance; (3) The problem of high inlet temperature; 4. Exhaust system problems (1) Muffler problems; (2) Exhaust pipe resistance; 5. Other factors (1) Fuel quality problems; (2) environmental factors; (3) Device matching problems.

The ignition time, the oil pump and the nozzle should be checked, and the black smoke is because the combustion is not complete, and a normal vehicle will emit a puff of black smoke behind it when it slams on the accelerator, and then the black smoke will decrease until normal.

Hello, check if it is the fuel injector that needs to be replaced.

Hello! The black smoke emitted from the EFI diesel car may be caused by the following reasons:1

Air filter blockage: If the air filter is not replaced or cleaned for a long time, it will lead to insufficient air, incomplete combustion, and black smoke. 2.

Fuel nozzle blockage: If the fuel nozzle is not cleaned or replaced for a long time, it will lead to uneven fuel injection, incomplete combustion, and black smoke. 3.

Fuel system failure: Failure of fuel system components such as fuel pumps or high-pressure oil lines can lead to insufficient or uneven fuel injection, incomplete combustion, and black smoke. 4.

Engine failure: such as insufficient cylinder pressure, air intake system leakage, etc., will lead to incomplete combustion and black smoke. Repair Method:

1.Replace or clean the air filter. 2.

Clean or change the fuel nozzle before shouting. 3.Inspect the fuel system and repair or replace faulty parts.

4.Inspect the engine and repair or replace faulty parts. It is recommended to find a professional car repair technician for overhaul and maintenance.

The cause of black smoke emitted by the EFI truck is incomplete combustion caused by uneven or excessive oil supply to each cylinder, insufficient air intake, poor atomization, and premature fuel injection time. 1.Remove the air filter and observe the exhaust smoke color.

If the smoke exhaust situation improves, the fault is caused by a heavily soiled air filter. 2.Check if the oil supply time is too early, and if so, adjust it.

3.When the engine is running, the oil can be cut off one by one. When the cylinder is broken, the engine speed decreases, the black smoke decreases significantly, and the knocking sound weakens or disappears, indicating that the cylinder is supplied with too much oil.

If the engine speed does not change much and the black smoke disappears, the spray quality of the cylinder injector is poor. Once the faulty cylinder is located, disassemble and inspect the injector. 4.

It is recommended to find a professional repair shop for inspection.

Dear car owners, black smoke, there may be several reasons Oh dear, 1. Caused by incomplete combustion caused by uneven or excessive oil supply to each cylinder, insufficient inhalation of air, poor atomization, and premature lack of filial piety in the jet; 2. Remove the air filter and observe the exhaust smoke. If the situation of black smoke exhaust improves, the fault is caused by the serious dirt of the air filter; 3. Check whether the oil supply time is too early, and adjust it if it is too early; When the engine is running, the oil can be cut off on a cylinder-by-cylinder basis. When a cylinder is cut off, the engine speed decreases, the black smoke decreases significantly, and the knocking sound becomes weaker or disappears, indicating that the cylinder has too much oil supply.

If the engine speed changes small and the black smoke disappears, it means that the injector spray quality of the cylinder is poor. Once the faulty cylinder is located, disassemble and inspect the injector.

Causes of black smoke when EFI diesel vehicles speed up:

1. The problem of diesel itself. The grade of diesel used is wrong, the viscosity is too large, or the quality of diesel is too poor, which is not easy to catch fire, so that the exhaust emits black smoke, and at the same time, the noise of the combustion chamber and exhaust pipe is also easy to produce carbon deposits. The solution to the Huai section: choose the right regular and suitable diesel;

2. The gap between the intake and exhaust valves is too large for open combustion, which reduces the valve opening, or the parts of the fitting mechanism are loose, worn and deformed, the relative position of the camshaft gear and the crankshaft timing gear changes, and the valve opening and closing time is incorrect, resulting in insufficient fresh air in the cylinder, resulting in black smoke during acceleration. Solution: Valve clearance, valve springs and valve seals should be checked;

3. The oil supply of each cylinder of the high-pressure oil pump is uneven or too large. The uneven oil supply will produce unstable speed and intermittent black smoke; Solution: The oil supply of each cylinder of the high-pressure oil pump should be adjusted to make it balanced or within the specified range;

4. The wear of cylinder liner and piston components is serious. When this happens, the piston ring seal is not tight, and the air pressure in the cylinder drops seriously, resulting in the diesel fuel can not be fully burned and black smoke is emitted, and the engine power drops sharply. Workaround:

Wear parts should be replaced;

5. The exhaust back pressure is too high or the exhaust pipe is blocked. This kind of imitation situation will cause insufficient air intake, which will affect the mixing ratio of air and fuel, resulting in excessive oil volume.