Why does a small gasoline engine flood the cylinder?

Why does a small gasoline engine flood the cylinder? He is not an oil-flooded tank, but a gasoline-flooded tank.

Because the engine can't start for a long time, the fuel injector has been spraying too much oil, and the gasoline sprayed blocks the gap of the spark plug, the spark plug can not jump the fire, and the vehicle cannot start, this phenomenon is called engine flooding.

Engine flooding is a man-made phenomenon that occurs more often in carburetor engines.

It is a man-made phenomenon that occurs mostly in carburetor engines. When starting in winter, they are often willing to adjust the two feet of oil to increase the amount of gasoline in the cylinder, so as to facilitate the car to start at low temperatures. However, when the amount of gasoline in the cylinder is excessive, the normal ignition and explosion of the spark plug [1] is blocked, and the phenomenon of failure to start or knock the cylinder is produced.

i.e. the so-called"Flooded tanks"Finish. The solution is to remove the spark plug and clean it, and if there is too much oil left in the cylinder, suck it out.

Engine flooding is a phenomenon that is prone to occur when a single-cylinder diesel engine is started in winter, and flooded cylinder is also called"Drowning"The reason is that the temperature is too low in winter, the compression ratio of the engine cannot be reached when the engine is started [2], and the diesel cannot be burned normally.

EFI engines will also appear"Flooded tanks"phenomenon, the solution is: keep pressing the accelerator pedal to the end, hit the motor for 5 seconds, 3 seconds apart, repeat twice, the problem can be basically solved. If there is too much fuel, remove the spark plug and clean it.

Principle: When the ECU receives a signal that the engine speed is lower than 500 rpm before the ignition switch is on-si, the TPS sensor (throttle position sensor) is fully on, and the ECU will control the injector to stop the injection. Excess fuel in the cylinder is discharged from the cylinder during start-up.

until the cylinder mixture returns to its normal proportion. At this point, the spark can ignite the fuel in the cylinder, and the revolutions start to rise. Above 500 rpm, the ECU approves the end of the engine clearance overflow function.

Start controlling the injectors to work, and the engine starts running normally. This function is internally named (Clear Overflow Function) in the ECU

1. There are pores or cracks in the cylinder head. In the PT fuel pump fuel supply system of diesel engine, the diesel channel is on the cylinder head, and the cylinder head has both oil and water channels, as well as diesel channels. When working, the diesel pressure in the diesel channel on the cylinder head is, the pressure of the water is less, the diesel pressure is higher than the pressure of the water, once the porosity, sand hole or crack appear on the cylinder head, the waterway and the diesel channel will be connected, then the diesel will enter the waterway.

2. The seal fails or the mechanism is faulty.

For example, the oil seal of the spindle of the PT pump fails, and the diesel oil enters the timing gearbox and reaches the oil pan; The oil shut-off valve at the diesel outlet on the PT pump is not closed tightly, and although the diesel engine has been shut down, the diesel can still enter the oil pan due to the high position of the diesel tank.

Hello friend, he must have been caused by a broken head gasket in this situation. I hope my answers will help you, and if you have any questions, you can always contact me. BBA Mercedes-Benz BMW Audi Maintenance wishes you a happy life, all the best, and a lot of money!

There are several points that need to be checked, 1 is to check the water plug, whether there is corrosion caused by the oil channel and the water channel wearing! 2 is to check the cylinder gasket, whether the cylinder is worn or corroded, 3 is to check the cylinder liner water seal, whether the corrosion causes oil and water penetration, more inspection can find the reason! Be meticulous, and there is a very low probability that it is caused by cracks in the cylinder head or cylinder block!

The reasons for burning engine oil can be understood

1.Domestic oil products (including gasoline and engine oil) are prone to carbon deposits;

2.Carbon deposition causes the piston ring to jam and lose its oil scraping performance; The oil return hole is blocked, and the oil cannot return to the crankcase normally;

3.Wear between the cylinder wall and the piston, the gap is too large.

4.The corrosion and aging of valve oil seals and crankshaft oil seals lead to oil leakage and burn engine oil, and many car owners have not solved the problem after overhaul, and there are other problems in the car.