In the absence of tools, what is the reason for the failure of the car to start and the troubleshoot

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 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!

Hope, thank you.

Hello, check if the vehicle is powered on.

The common faults of the car starting system are mainly as follows:

The starter does not work, the starter is running weakly, the starter is idling, the starter is starting to make teeth, and the starter cannot be released. The most common of these failures are the starter not working and the starter not functioning.

Solution: 1. Check the battery: when the horn does not sound, the instrument light is dim, the power window is slowly lifted, the headlights of the car are dim, and the anti-start indicator light is flashing (some models), check whether the battery binding post is oxidized or poorly connected, the battery is poorly grounded, and the starting voltage of the starter is measured to be greater than.

2. Check the starter: short the main terminal rod of the cable on the starter and the starter binding post, if the starter cannot work, it means that the electromagnetic switch of the starter is faulty, and the starter needs to be removed for maintenance.

3. Check the ignition switch and the ignition switch related circuits.

4. Check the car starting relay and starting insurance to judge the fault location.

1.Sensor part: The coolant temperature sensor is short-circuited, and the crankshaft position sensor fails to exit.

Other parts: the fuel circuit pressure is too low, the power supply or ignition system is faulty, the air filter is clogged or the intake pipe is leaking badly, and the engine cylinder pressure is too low. If it is difficult to start the warm-up engine, and press the accelerator pedal all the way down (...)

2.Poor intake manifold absolute pressure sensor or circuit can cause the engine to idle unsteadily, idle incorrectly, start difficult or turn off after starting. When the above phenomenon occurs, the pressure sensor and circuit should be detected.

The engine cold engine starts normally, but it is difficult to restart within 15min after the heat engine is turned off, and it stays for a long time.

Common causes of engine starting difficulties:

1. The ignition difficulty caused by carbon deposition in the car is accompanied by slight shaking at idle, cleaning the throttle, cleaning the carbon deposition in the inlet tract, and cleaning the fuel injector can solve the problem.

2. The ignition energy of the spark plug is weak, and some car owners do not replace the spark plug after the maintenance cycle in order to save money, which will lead to a lack of fire when the ignition energy of the spark plug decreases seriously, and the engine of many models is mostly direct injection in the cylinder, so the requirements for the spark plug are higher.

3. The low pressure of the fuel circuit is insufficient, and the insufficient oil pressure of the low-pressure oil circuit directly leads to the secondary ignition of the engine, the specific reason is that the first ignition is not ignited by the low-pressure oil circuit in the establishment of oil pressure, and the second time can catch fire. Specific inspection components: fuel pressure regulator, gasoline pump, gasoline filter and internal piping.

4. The battery is losing power, and the fault phenomenon of the battery is more common, and the first reaction of the owner when the car is generally not hit is that the battery is out of power. The solution is also very simple, you only need to find a car or other battery to take power.

5. The exhaust pipe is blocked, and the situation of exhaust pipe blockage generally rarely occurs, unless it is a coincidence or someone is playing a prank, but this situation is also easier to investigate.

6. The mixture is too thick or too thin, and many car repair masters know a cheat. What happens when the car doesn't hit and the other parts are fine? The master will spray the chemical cleaning to the throttle to hit the car, and the car is easy to get on the car and try it again and again (it is not recommended that the owner operate it himself).

7. The engine timing is not right, the engine timing does not match the engine must not be able to get on the car, and many car engines are in the form of timing belts, and the timing belt itself has no disadvantages, but some models of engines can cause tooth jumping when replacing the generator belt, resulting in no car.

The main problem of the difficulty in starting the car is that the drivers do not maintain the car enough, and the maintenance of the car should be regular and quantitative.

Reason, for reference only, orange cover 1, sensor failure,; 2. The quality of gasoline is not up to standard; 3. The air leakage of the inlet pipe leads to the mixture being too thin; 4. The fuel pressure is low, the fuel injector is disturbed, and the fuel filter is blocked; 5. The signal of the pressure sensor and the throttle position sensor is abnormal; 6. The ignition timing is inaccurate and the ignition is too late. 7. Weak high-voltage sparks due to poor spark plugs, igniters or high-voltage wires; 8. The throttle is dirty; 9. The exhaust gas recirculation system works poorly; 10. The exhaust pipe is blocked; 11. The cylinder pressure is low; 12. Turbocharging system failure 13. Clutch three-piece set, so 14 empty round Li air filter is blocked, piston ring is broken or stuck, valve seal is poor, ignition time is too late, carburetor mechanical failure, air intake pipe leakage, individual cylinders do not work well or do not work, etc. However, some of the faults of insufficient engine power can be solved by use. Such as:

General wear of the cylinder, poor flow of the carburetor oil passage, etc. When the user reflects that the engine power is insufficient, when the oil is burned, we should first judge the cause of the lack of power, in the exclusion of the air filter blockage, the carburetor throttle can not be fully opened, the ignition timing is not good, the intake pipe gasket is damaged, the individual cylinder does not work or does not work well, and then according to whether the engine fuel consumption is too high to judge the carburetor working condition, if the fuel consumption is too high, the exhaust smoke is very thick, it is likely that there is a mechanical failure such as the volume hole falling off, this fault must be repaired as necessary. Finally, we have to judge the wear and tear of the engine cylinders.

Engine wear directly affects the tightness of the cylinder; Therefore, checking the tightness of the cylinder can largely reflect the degree of wear of the cylinder, and the most convenient way to check the tightness of the cylinder is to use the cylinder pressure gauge to check the compression pressure of the cylinder.

1. Carbon deposits. At high temperatures, carbon deposition has a strong adsorption effect on gasoline, and if there is more carbon deposition in the intake valve, throttle, piston, etc., it is easy to adsorb some fuel, resulting in the mixture being too thin, thus affecting the start.

2. Water temperature sensor.

The water temperature sensor has the effect of correcting the pulse width of fuel injection, if it works poorly and cannot provide the correct temperature signal, it will affect the engine injection, and it is easy to cause the mixture air-fuel ratio to be abnormal, affecting the start.

3. Inlet air temperature sensor.

The higher the temperature of the inlet air temperature sensor, the more concentrated the mixed steam, or the broken circuit of the inlet air temperature sensor or the poor tie will cause the mixed steam to be too thin, but too thick or too thin is easy to cause difficulty in starting.

4. Fuel quality problems.

The temperature of the engine compartment is still very high after the hot car is turned off, and if the fuel quality itself is easy to volatilize, it is easy to form a higher evaporation pressure in the fuel rail, and when this pressure is greater than the pressure of the fuel supply system, it will form air resistance, causing the oil vapor sprayed by the fuel injector to be too thin, resulting in difficulty in starting.

5. Fuel injector dripping.

Fuel injector dripping, because the engine has just turned off and the temperature is still very high, the leaking fuel will turn into oil vapor into the intake pipe, at this time, the hot start will cause the mixture to be too thick, so that it is difficult to start.

6. The solenoid valve of the carbon canister is damaged or closed loosely.

The solenoid valve of the carbon canister is the function of controlling the oil and gas in the carbon canister, after the engine is turned off, the gasoline vapor and fresh air are mixed in the tank and stored in the activated carbon canister, when the engine is started and only moved, the solenoid valve between the activated carbon canister and the intake manifold is opened, and the gasoline vapor in the activated carbon canister is brought into the cylinder by clean air to participate in combustion under the vacuum degree of the intake pipe. If the canister solenoid valve is damaged or not closed tightly, then the mixture in the intake tract of the engine will always be in a thickened state, because the engine control computer has not yet controlled the canister solenoid valve to work, and will not issue a command to reduce the amount of fuel injected. The fuel atomization of the hot car itself is very good, and there is no need to replenish oil and gas, and the carbon canister has been replenishing oil and gas to the inlet tract, which will definitely cause the mixture to be too thick, which will lead to difficulty in starting.

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can be consulted at any time to ask the car to ask the question, 24 hours ** answer.

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can consult car problems at any time, 24 hours ** answer.

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.

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 phenomenon of not starting may be that the ignition switch is turned on and the engine does not have any signs of starting, the starter is loud but cannot rotate, the starter can turn but cannot move the engine, or the engine can be driven by the starter but cannot start. Difficulty in starting may be the slow rotation of the engine, or the uneven sound when the engine rotates.

Starting difficulties may occur in freezing weather or very hot weather, or at room temperature, or it may be difficult to start a cold car for the first time, and it may start normally when the car is hot.