Causes and troubleshooting of car failure to start

Analysis and response to the most common causes of vehicle failure to start.

1. Take the wire: This is a necessary item for the car to take the electricity, do not take two wires to make do, because the instantaneous current of the vehicle at the start can reach 200-600A, and the diesel car even reaches 1000A, if it is calculated, 10 square copper wires can ensure the smooth and safe start, so the car battery connection line must buy the right brand, the quality is the best, do not try to be cheap. This is one of the must-have items in the car, once the battery is out of power, you can take it out and use it, and you can also help others when you don't use it.

2. Emergency power supply: This is a new type of power bank like a thing, there are two kinds of lead-acid and polymer lithium battery, which can help the vehicle with a loss of power to start, and can also have lighting, charging mobile phones and multi-functional supplies used with an inflatable pump to inflate the car. And it is generally portable, very lightweight, if you have it, you don't have to ask others for help.

Be sure to charge it in time after use and keep it full of power to deal with emergencies.

3. Positive, first connect the positive: first turn off all the electrical equipment on the car, make the key in the OFF position, open the cabin cover to find the battery, there are positive and negative poles written on the battery, generally the red "+" sign is the positive pole, and there are generally two wires, at this time, take out the red one, open the battery cover, pinch the clamp on the head to clamp firmly the positive pole of the battery of the electric car, and the clamp at the other end to clamp the positive pole of the battery of the rescue vehicle. Be sure to connect the positive electrode first, then the negative electrode, do not reverse the order, and do not use the battery clamp to touch anywhere except the battery pile head.

4. Negative connection, negative connection: After the red positive electrode is connected, take out another wire, first clamp the negative pole of the tram battery, the negative electrode is generally black "—" number, and then pinch the other end of the clip, from beginning to end the clip do not touch other places, to clamp the negative pole of the rescue vehicle battery, when the connection will pop out of the electric spark, please don't be afraid, this also shows that you are right. The reason why the negative electrode is not connected first is because the whole vehicle is basically a negative electrode (that is, commonly known as "tie iron"), if the negative electrode is connected first, when connecting the positive electrode, the clip will cause a short circuit and burn the parts on the car when it touches any conductive place in the body.

5. After starting the vehicle, first remove the negative, and then dismantle the positive: after the battery is connected, the rescue vehicle will first ignite and charge the battery, and then the no tram enters the vehicle to open the key, at this time the instrument light will be lit smoothly, and then try to ignite (not more than 5 seconds), if it fails to start smoothly, step on the accelerator of the rescue vehicle, and the speed is kept at about 2500 rpm, and then the tram is ignited again, if the starter is no problem, the car has oil in the case of general can be started smoothly, after the non-electric vehicle starts, Remove the negative clamp first, then remove the positive clamp, for the same reason as why the negative pole is followed by the fourth one.

The positive and negative poles of the battery must not be reversed, and the order of assembly and disassembly should be strictly in accordance with the order of first connecting the positive and then the negative, and the first dismantling and then the positive.

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2.When there is very little gas in the car, check if the car is parked in an uneven place, because if the ground slope is large, then the fuel tank is inside.

3.Check if the vehicle's battery is running out or without power If you can only hear the sound of the starter when starting the car, then it is most likely due to.

4.Check if the circuit is.

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 is dead.

Sometimes when we wake up in the morning and find that the car does not start normally, it is likely that our trunk is not completely closed, and the trunk light is always on, causing the battery to run out.

2. The spark plug cannot be ignited.

The 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.

3. The starting circuit is faulty.

There is only a slight "click" sound when starting, and there is no response, which is caused by the starting relay card issuance. 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.

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:

1.The 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 box is loose and lacking.

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.Check whether the main output cable 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!

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1. Zen Kuan should first check the spark plug. Because the spark plug is the key to the ignition system of the car, and the ignition system is the key point of the engine work, the performance of the spark plug is related to the working performance and efficiency of the whole vehicle.

2. The battery loses power - its performance is characterized by the starter starting to rotate but the speed is not enough, that is, it is weak, and then the starter only clicks and does not turn. Low temperature in winter and forgetting to turn off individual electrical equipment will cause the vehicle to be unable to start, especially in winter for long-term short-distance low-speed use, the battery voltage will be lower than the rated value, starting and unable to operate normally. If it happens, please call the service station for rescue**, or find the right car, or temporarily on fire, and then you must go to the service station to replenish the battery.

3. The flow of gasoline is blocked - the performance is characterized by no oil pressure in the engine oil supply pipe. This situation usually occurs in the morning when the temperature is very low, and is caused by long-term dirt in the fuel line. When the temperature is very low, the water is mixed with debris, and the fuel line is blocked, and as a result, the can't start the canopy.

Emergency method: Put the car in a warm environment, and the car can start the chain after a while; Or use the method of cleaning the oil circuit to solve it completely.

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.

Summary. There are many reasons why the engine cannot start properly, such as timing problems, engine cylinder pressure, ignition, oil circuit, three-way catalytic converter, crankshaft sensors, engine computer board and circuit main relay failure, which can cause the vehicle to fail to start properly.

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Shows that the car brake is enabled.

There are many reasons why the engine cannot start normally, such as timing flutter problems, engine cylinder pressure with travertine, ignition, oil circuit, three-way catalytic converter, crankshaft sensor Luyu, engine computer board and line main relay failure, which will cause the vehicle to fail to start normally.

First of all, you need to see what the symptoms of the start are the source of the imitation, if the starting engine does not turn, then this situation needs to check whether the battery power is not enough or the starter is caused by a problem.

Due to the long age of the vehicle driven, there will always be a variety of problems, such as the car can not start, which will bring trouble to the owner, so what are the reasons and solutions for the car to not start?

If it is because of these two reasons, the owner can choose to go to the nearest 4S store or choose to charge the car at home according to his own situation. Of course, you can also choose to send distress signals to other cars around you and borrow fuel from other car owners.

Under normal circumstances, if the gears of the car do not match, it may also fail to start. For example, P gear or N gear is the correct gear when the automatic transmission starts, and the owner can check whether the wrong gear is hung up, if so, it may also cause safety hazards. It is recommended that when encountering this kind of problem, the correct solution is for the owner to properly adjust the correct gear of the vehicle, and then try to restart the car.

However, if the car cannot be started due to other reasons, you need to go to a regular 4S store to find a professional master to check, and then take the correct solution.