If the car cannot be started, what will be the fault phenomenon?

There are many aspects, some when you hit the start key, you listen to whether the relay is ringing or the starter is ringing, if the relay is ringing, then it is recommended that you change the relay! If the starter is ringing, it is the electromagnetic switch (commonly known as the suction switch) internal contact ablation, if the conditions allow, you can disassemble and repair, after dismantling, the copper sheet inside is on the opposite side, and the contacts are sanded with sandpaper and installed on the other side!

If there is gasoline, it depends on whether the high-voltage coil has low-voltage electricity (this can be measured with a test lamp, and the high-voltage coil has a plus terminal post or a column with a *live wire) If there is electricity, see if there is high-voltage electricity (put a high-voltage wire in the middle of the distributor close to the engine to start the engine to see if there is electricity) If there is none, then you will replace the high-voltage coil, If there is, then check whether the distributor cover and the fire divider head have broken down, if there is a replacement, after the replacement is done, then see that the spark plug of the distribution cylinder line should be on fire, and the car can be started!

Diesel car: Now the temperature is low to see if the oil is frozen, if it is frozen, then remove the diesel filter element (emergency use), and there is a place where the oil pipe is blocked or leaking!

This situation is generally related to the poor operation of the main injector, cold start injector, temperature control switch, ECU and control circuit, battery power loss, ignition or pulse generator damage, fuel system does not supply oil or abnormal oil supply and other factors.

1. Battery power loss:Because the voltage at startup is lower than the minimum voltage for the computer to work, the engine computer does not work and cannot be started. In this case, the battery should be recharged, or replaced.

2. The spark plug cannot be ignitedThe spark plug itself is easily damaged, the high-voltage line is short-circuited, etc., resulting in the spark plug can not be ignited, and the other is that the spark plug of poor quality is also the reason for the failure to start normally, in this case, it is recommended to replace the spark plug.

3. Starting circuit failure:There is only a slight click when starting, and there is no response, which is caused by the starting relay card. At this time, as long as you press the tail of the solenoid to force the solenoid to move forward, the starting circuit can be turned on, so that the engine can start.

Precautions for starting and stopping the car.

Avoid using the start-stop system in ramp situations. Temporary parking on the ramp, the start-stop system should be avoided as much as possible. The start-stop system starts slowly, and it is easy to cause the vehicle to slide when the brake is released, and the engine is too late to catch fire, and the power is insufficient, resulting in danger.

However, the vast majority of vehicles will detect the ramp, and the start-stop system will not be activated if the downhill slope is more than 10% and the uphill slope is more than 12%.

When wading through water, the start-stop system must be turned off, and when passing through waterlogged roads, remember that the start-stop system must be turned off, in case it needs to stop while driving, the engine stalls, and the exhaust pressure suddenly decreases. Water can easily flow backwards from the exhaust pipe into the engine, causing the engine to fail to start.

The above content refers to People's Daily Online-It's Really Cold Why does my car not start well in the morning.

(1) Causes of oil supply system: low-pressure oil circuit blockage, loose pipeline oil leakage, high-pressure oil pipe with air, poor technical condition of fuel injector, incorrect fuel injection timing angle.

2) Causes of starting device: power failure, poor contact of electromagnetic switch, poor contact between the commutator of the starting motor and brushes, and slippage of the clutch of the transmission mechanism of the starter.

3) Insufficient cylinder compression pressure: the cylinder gasket is damaged and leaks, the valve is not closed tightly, and the piston cylinder liner is worn and leaking.

4) Insufficient air intake: The air filter element is blocked.

1. The battery loses power, or the connecting wire is broken or the joint is loose; 2. The contact of the starting relay is seriously ablated or its coil is broken; 3. The contact of the starter electromagnetic switch is seriously ablated or its suction coil is broken; 4. The internal winding of the starter DC motor is broken or short-circuited; 5. The armature shaft of the starter is bent, and the gap between the shaft and the bearing is too tight; 6. The commutator is seriously ablated, the brush is worn too much, the brush is stuck in the brush holder or the brush spring is too soft.

1) The engine cannot be started due to a failure of the starting system or it turns too slowly so that the engine cannot start

1) The battery has insufficient power storage, the electrode pile clamp is loose or the electrode pile is seriously oxidized;

2) The main fuse of the circuit is broken;

3) Ignition switch failure;

4) Starter failure;

5) The starting line is broken or the line connector is in poor contact.

There are many ways to have an impact'''It is recommended to use a computer to check whether there is a fault code first''Whether the oil and electricity are normal'''Check that the throttle is dirty or not'''Water temperature sensor'''spark plugs, etc'''[If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Mechanically -

1- Insufficient cylinder pressure.

2- The timing error is too large; The gas distribution phase is incorrect.

3- The exhaust system is clogged.

4- The air intake system is clogged.

5- The crankshaft and camshaft are locked due to poor lubrication.

Starting system-1 - insufficient battery voltage.

2- Failure of starting switch, circuit, starter, relay.

Electronic control system -1 - inlet pressure, air flow meter problem.

2- The water temperature signal is abnormal.

3- Engine speed sensor.

4- Fuel pump, fuel pump relay, fuel pressure regulator.

5- Injector control is abnormal.

6. The camshaft signal is abnormal.

High voltage ignition-1 - main high voltage line abnormality.

2-distributor.

3 ignition amplifiers.

4. High voltage coils.

The anti-theft system is in anti-theft state;

There is no fuel.

Generally, the battery voltage is insufficient, or the engine has a sensor on the engine caused by the ignition or the oil pressure of the gasoline pump is insufficient, resulting in poor oil supply. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

You said your car was out of battery and was parked for a bit long. Everywhere is not running, and it is in a semi-paralyzed state.

Hello, the battery is not electric, the starter is burned, the insurance inspection is burned, I am checking the oil circuit, I hope it can help you, [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The most common problem with a car not starting properly is that the battery is dead, and the battery may need to be replaced.

If the fault of the battery is ruled out, or can not start normally, you need to check the oil circuit, that is, whether the oil supply system is normal, it is likely that the oil supply pipe and other parts are plugged or... Frozen.

Whether the spark plug works properly will also affect whether the car starts smoothly or not.

If none of the above ... Let's take a look at the intake and exhaust valves.

Hello, battery voltage, gasoline pressure, [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, there are many reasons for this. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

The fault cause diagnosis of the car can not start is as follows: 1. Test the battery: First of all, the battery should be tested. Whether the battery is insufficient.

2. Detection of ignition timing: The slippage of the timing belt is the root cause of the failure that there is no electric spark and the engine cannot start. 3. Detection and start system:

The circuits of the starting system generally include the battery, the starting motor, and the cables that connect these components. In addition, ignition switches, starter relays or solenoid coils, as well as in-vehicle immobilizers are also important components of the starting system. 4. Detect the quality of EDM:

The quality of the EDM is detected by means of a spark detector. 5. Detection of fuel system: The diagnosis of fuel system can be divided into two parts:

Diagnostics of the fuel supply system and the diagnostics of the injector circuit system. The fuel supply system can be detected by measuring the flow and pressure of the fuel. The best way to measure fuel flow is to inspect the line when there is a load in the fuel supply line.

The reason why the car cannot start is usually due to insufficient power caused by battery damage, failure of the starter circuit, poor contact of the electric fuel pump motor, damage to the ignition module, and failure of the spark plug to jump normally.

Common reasons why a car won't start:1Battery drain and damage are definitely number one because I'm also a mechanic.

Now he has opened a small shop near the entrance of the community, and he goes to the community more than 5 times a week to help. Forgetting to turn off the lights caused the battery to run out of power, and I couldn't start the car, which is the most common. 2.

In the summer, the car circuit wades in the water, and there is a lot of rain. When many cars pass through puddles, they splash on the high-voltage lines of the engine and the location of the circuit plugs, causing the circuit to fail, and the bench bridge causes the vehicle to fail to start. 3.

The starter, as the main device for starting the engine, also has a high failure rate, especially for some vehicles that are more than 6 years old. 4.Gasoline pump failure.

This has always been a stumbling block on the old model. The quality of the parts is one thing, and it can also be caused by too many impurities in the oil, but now this failure is obviously gradually decreasing. 5.

Failure of the anti-theft device. Nowadays, the car configuration is getting higher and higher, and it is all original anti-theft devices. If you make a mistake or have a faulty circuit, the data of the car key anti-theft chip will be lost.

The anti-theft device will force the car to "cut off the fuel and fire", so that the car can not be started. It is also one of the most common. 6.

The failure of high-voltage ignition is well explained. Generally, it is the spark plug, ignition coil, high-voltage wire, fuse and other wearing parts that break, resulting in failure. There are many reasons for failure.

Sometimes, several vehicles with this failure are repaired every day. 7.When the generator fails, it cannot charge the car battery.

When it's halfway through running, it suddenly shuts down. This failure often gives the owner an unexpected surprise. These are probably the most common, and the rest are not encountered often.

The reasons for the failure of the car to start are: 1. The gasoline quality is poor and not up to standard; 2. Oxygen sensor failure; 3. The air flow sensor is faulty; 4. Spark plug carbon deposit; 5. Engine knocking; 6. The water temperature sensor is damaged; 7. The engine lacks cylinders; 8. The battery is out of power or damaged. The workaround for the car won't start is:

1. Check whether the battery is low or damaged; 2. Check whether the oil measuring lamp on the dashboard is on; 3. Check whether the control circuit of the starter is damaged; 4. Check whether the wiring from the starter to the battery is fused; 5. Check whether the starting fuse is blown or not.

1. The battery loses power.

Due to battery damage, long-term shutdown and continuous use of on-board electrical appliances, lights are not turned off, etc., the battery cannot be started due to power loss.

2. The sensor is damaged.

For example, the crankshaft position sensor, camshaft position sensor in some models, and air flow meter are damaged, and the vehicle cannot be started.

3. Oil pump. When the fuel pump is damaged, when the vehicle is started, the fuel cannot be supplied to the fuel system or the fuel supply is insufficient, resulting in the vehicle not being able to start.

4. Anti-theft system.

Due to the serious power loss or damage of the remote control battery, the anti-theft cannot be lifted when starting, resulting in the vehicle being unable to start.

5. Relays.

The vehicle cannot be started due to damage to the oil pump relay, main relay and starting relay.

6. Fuse blowing or fuse box problems of some models.

When the fuse is blown due to the fuel system, ignition system, etc. due to wiring problems. Due to the design problem of the fuse box of some models, the body anti-theft system fails, such as BYD S6.

There are several reasons why the car won't start: one. No oil. Two. Power. Three. No air intake.

Let's analyze these four items approximately:

One. No oil.

The reasons for the failure are:1The oil pump relay is working poorly. 2.The oil pump is not working well. 3.Out of gas.

Fault Detection: 1Detection of oil pump relays:

Turn on the key switch and don't hit the motor, you will hear a click, which means that the relay is working properly! If there is a continuous clicking sound, check whether the tie wire is loose. If the relay is judged to be damaged, the light relay can be interchanged with the oil pump relay.

Drive to the repair shop and buy a new relay.

2.Detection of oil pump: Generally, it is checked with an oil pressure gauge, because it is self-excluded.

There is no oil pressure gauge! The easiest way to do this is to remove the tubing and turn on the key switch on the position. Do not start the motor.

If the oil pipe is injected, it means that the oil pump is normal. On the contrary, it is not normal.

Two. Power. Cause of failure:1The head of the battery pile is loose.

2.The high-voltage ignition coil is damaged. 3.

The cylinder line is damaged. 4.Whether the starting relay is plugged in properly or not, it is damaged.

5.Whether the insurance is burned out. 6.

Whether the motor is working properly. 7.Whether the main output cable of the computer case is loose.

Fault Detection: 1Detection of loose battery pile head: observe whether the instrument is displayed, if the whole car has no electricity, open the hood, and observe whether the battery pile head connection is loose and oxidized. Loosen it with a wrench, and pour boiling water on the pile head for oxidation.

2.Detection of ignition coil: You can use a multimeter to check the resistance value of its primary and secondary coils, which should be within the conforming range, and the secondary resistance should be larger than the primary resistance!

But that's not sure if it's in good condition! Unplug the cylinder wire, observe it for flashover, and see if there is any leakage in the insulation! The jumping fire should be blue, and the sparks are thick and long!

3.Detection of steel wire: check the resistance value with a multimeter, which should be within the load range. Unplug the cylinder cord and observe it for a flashover. Or skip the fire and replace.

4.Detection of starting relay: There is a problem with the general relay, and there is no response when hitting the motor. Plug and unplug the relay again to see if it starts normally! Replace the relay or motor shorted.

5.Detection of the fuse: Open the fuse and observe whether the fuse indicator is normal and whether the fuse is burned. Replace the fuse.

6.Motor detection: mainly listen to whether the sound of the motor is normal. If the carbon brush of the motor is severely worn, it can be temporarily activated by hitting the motor with a hammer. Go back to the repair shop for replacement.

7.Whether the main output line of the computer box is loose: check whether the plug-in of the computer box and its wiring and each sensor is loose. Fastening is recommended.

Three, no air intake.

Cause of failure: Damage to the eccentric wheel and wear of the eccentric shaft, resulting in the intake and exhaust valves cannot be opened and closed.

Troubleshooting: Call a tow truck!

If it helps you, please light up and adopt, thank you.