What is the reason why the JMC Baodian diesel pump does not call

In the gasoline injection system, the fuel pump is an extremely critical component, and once the fuel pump fails, the car will have various undesirable symptoms.

1. What problems will a failure of the fuel pump bring to the car?

1. There is acceleration weakness, and there is a phenomenon of azole car when refueling urgently. 2. It is not easy to start when starting, and it takes a long time to hit the key. 3. Abnormal noise, there is a buzzing sound when driving. 4. The engine fault light is on. 5. Abnormal engine shaking.

Second, the life of the gasoline pump pump.

1) Theoretically, this thing should have the same life as the car, so there is no limit to the number of kilometers and time. Some manifestations of gasoline pump damage: 1. When the pump core is damaged, when the fuel supply system is working, there is no sound of gasoline pump running when the key door is opened; 2. When the pump body is damaged, the engine cannot be started because the pressure relief and fuel pressure cannot reach the specified fuel pressure value, and it cannot be atomized well.

3. Don't wait until the gasoline lamp alarm is not refueled, because the gasoline pump relies on gasoline to conduct heat and cool down, and when the gasoline liquid level is too low, it will not play a role in cooling and heat dissipation, reducing the service life.

2) Failure of gasoline pump: Gasoline pump check valve damage: no residual pressure, resulting in difficulty in starting.

Centrifugal pump impeller wear: the oil supply pressure is reduced, and the acceleration is weak. Carbon brush wear:

The gasoline pump stops and cannot be started, in this case you can knock on the bottom of the fuel tank and the oil pump can still run. Mechanical faults such as rotor stagnation: The working current of the oil pump increases, resulting in damage to the relay or fuse.

Second, maintenance suggestions.

1. Most of the electric fuel pumps used in existing vehicles are installed in the fuel tank. Some vehicle access panels allow the replacement pump to be removed without disassembling the fuel tank.

2. The fuel pump in the tank is submerged in the gas to help them keep it cool will destroy the fuel pump.

3. The fuel filter should be replaced when the fuel pump is replaced.

4. A blocked fuel filter or a problem with the electrical system driving the fuel pump may cause symptoms similar to those of a failed fuel pump. Confirm that the pump is the problem before it is replaced.

5. Gasoline is highly flammable to avoid fire and personal injury.

Hello, you said that there is no electricity, and the electricity on the hand oil pump is not affected.

Summary. Hello, the fuel injector of the electronically controlled common rail system is out of power, which can only mean that the ECU does not supply power to it, and the reasons for the power failure of the ECU are: the measurement pressure of the fuel rail is much lower than the command pressure, or the ECU does not get the position sensor signal, etc.

Anyway, the engine doesn't start. Remember to praise and help each other. Thank you!

Hello, the fuel injector of the electronically controlled common rail system is out of power, which can only mean that the ECU does not supply power to it, and the reasons for the power failure of the ECU are: the fuel rail measurement pressure is lower than the command slip pressure more, or the ECU does not get the position sensor to call the grip signal, etc. In short, the engine of Heqing can't start.

Remember to praise and help each other. Thank you!

Hello, the fuel injector of the electronically controlled common rail system is out of power, which can only mean that the ECU does not supply power to it, and the reasons for the power failure of the ECU are: the fuel rail measurement pressure is lower than the command slip pressure more, or the ECU does not get the position sensor to call the grip signal, etc. In short, the engine of Heqing can't start.

Remember to praise and help each other. Thank you!

Summary. According to the fault analysis of your car, this situation is generally caused by the damage of the engine module itself, and the pulse signal voltage of the fuel injector is sent from inside the computer version of the engine. The power supply voltage of the fuel injector is directly from the main fuse box, if the pulse signal voltage is not lit, the diode test light line is also on, and the problem caused by the damage of the engine computer version itself is mainly considered.

According to the fault analysis of your car, this situation is generally caused by the damage of the engine module itself, and the impulse signal voltage of the fuel injector is cracked from the inside of the engine computer version. The power supply voltage of the fuel injector is directly from the main fuse box, and if the pulse signal voltage is not lit, the diode test light is also open, and the problem caused by the damage of the engine computer version is mainly considered.

The computer has been changed, and it still doesn't.

Can the pulse signal of the current fuel injector light up the diode test lamp?

Yes. Doesn't it light up?

Well, it doesn't light up.

Then you can directly pull a power supply pin cable from the fuse box for the computer version of the engine and check it.

There's electricity on the computer.

Check the supply voltage to see if it is enough?

Pin 4 and Pin 6 have electricity, and Pin 71 has electricity.

If it is determined that the supply voltage of the module itself is sufficient, it must be caused by the damage of the module itself.

In this case, it is generally a high-pressure oil pump, which has the highest chance of damage. However, there are three common reasons: 1The high-pressure oil pump is damaged.

It is necessary to inspect and confirm that it is damaged and replaced. 2.Caused by spark plug and high-voltage pack failure.

3.Problems with fuel quality.

Summary. 1. Check the status of the battery, most of the difficulties in starting the car in winter are caused by the loss of battery power or the expiration of the battery service life. When the battery is low, the speed is weak when starting the car, and only the clicking sound is heard, and the clicking sound will gradually become a clicking sound when the ignition is lit again.

Do not ignite continuously to avoid the battery running out.

2. Replace the appropriate engine oil, as the temperature decreases, the viscosity of the engine oil will increase, and the oil flow will be difficult, so that the engine resistance will increase. If it is difficult to start, check whether the oil label is incorrect. If the original oil used is 5w 40, you can switch to 5w 30 or 0w 40 oil in winter to reduce the oil viscosity and make it easier to start.

The JMC Baodian diesel car can't be driven in the morning, and the hand oil pump is newly replaced, but it seems to be a little depressurized, and the car can't be pumped if it stops for 1 hour.

Hello, I have seen your question and am sorting out the answer, please wait a while

1. Check the status of the battery, most of the difficulties in starting the car in winter are caused by the loss of battery power or the expiration of the battery service life. When the battery is low, the speed is weak when starting the car, and only the clicking sound is heard, and the clicking sound will gradually become a clicking sound when the ignition is lit again. Do not ignite continuously to avoid the battery running out.

2. Replace the appropriate engine oil, as the temperature decreases, the viscosity of the engine oil will increase, and the oil flow will be difficult, so that the engine resistance will increase. If it is difficult to start, check whether the oil label is incorrect. If the original oil used is 5w 40, you can switch to 5w 30 or 0w 40 oil in winter to reduce the oil viscosity and make it easier to start.

The car oil pump is related to the engine not catching fire.

There are two situations when it can't catch fire:

One is that the starter can be heard, but the engine cannot start. The other is that after twisting the key, there is no sound.

The first case is when the starter works, but the engine does not. This is complicated by the fact that it can be caused by one of several failures. It is rare for two or more failures to occur at the same time, but it cannot be said absolutely.

1) First of all, it may be a circuit or electronic fault. The phenomenon that occurs is very sudden and without warning. The faults of the circuit are:

The fuse is blown out, the high-voltage coil is broken, the low-voltage circuit is broken, the center ignition wire is off, the distributor head is leaking, and the spark plug is damaged. Electronic failure mainly refers to the loss of function of the computer control board.

Oil pump failure, oil circuit failure, oil filter blockage, carburetor failure, nozzle damage, etc. Sometimes it happens that the fuel tank is empty and the owner doesn't know about it. Add a few liters of gasoline and all the gross glass (3) will be solved and the final and possibly mechanical failure will be solved.

Common mechanical failures are: time band (chain) breakage, cylinder leakage without pressure, etc.

The second scenario is when even the starter does not work or works barely. At this time, the first thing that needs to be checked is the battery or battery. There are many ways to check, but it's best if you have a voltmeter on hand.

Connect the positive and negative poles of the battery, and then twist the key to ignite. If the voltage indication drops below 8 volts at the moment of power on, there must be something wrong with your battery. It doesn't hurt to have a voltmeter, you can replace it with a small 12-volt bulb and a small section of power cord.

The same is true for the method, if the bulb suddenly becomes significantly darker, it is also an indication of battery aging. In many cases, the battery has failed, but the headlights can still be lit. This is not surprising.

Only at the moment of ignition can the performance of the battery be truly tested. Because this is when it has the most load. There's an easy way:

If you look at the outer wall of the battery with the naked eye, if you find that it has expanded and deformed, it means that a new battery is absolutely needed. In addition to the battery, the reason why the starter does not work can be a damaged ignition switch, a damaged ignition relay, or a damaged starter itself. Also, check the ground line and fuse.