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What Causes Abnormal Noise and Failure to Start When Igniting a Car?

1 Answers
Furtado
09/07/25 7:49am
There are several reasons why a car may produce abnormal noise and fail to start when ignited: Sharp abnormal noise when igniting the car: This squeaky noise is caused by belt slippage, which could be due to insufficient tension from the tensioner or the belt being stretched over time, making it too loose. Clicking or grinding noise when igniting the car: This sound occurs when the starter gear and the engine flywheel gear grind against each other. It is usually caused by severe wear on the gears due to prolonged use of the starter and flywheel, leading to misalignment and grinding. Tapping or rattling noise when igniting the car: This noise could be from the valve closing in the engine's valve train, which is typically the noisiest part of an engine. The sound is produced when the intake and exhaust valves close and is usually audible after starting. Alternatively, it could also be the sound of spark plugs firing.
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What to Do If You Keep Crossing the Lines in Subject 2 S-Turn?

Solutions for frequently crossing the lines in Subject 2 S-turn are as follows: 1. During the test, avoid being nervous and keep the vehicle speed slow. Especially when navigating the S-turn, the speed should be even slower. If the speed is too fast and the steering wheel is turned abruptly, significant deviation is likely to occur, inevitably leading to crossing the lines. 2. Excessive speed during the test may result in an invalid score. This is because there are sensors on the road that may fail to detect your performance, which naturally won't count. A speed of 30km/h is most suitable for navigating the S-turn. 3. Once the speed is properly controlled, simply use the hood as a reference and align it with the left and right boundaries of the S-turn. Keep the front of the car tracing along the boundary lines, and avoid making excessively large movements when turning the steering wheel.
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How to Open the Door When the Car Battery is Dead and the Door Won't Open?

Solutions for a dead car battery are as follows: 1. If the door can't even be opened in an emergency, you can use jumper cables to connect to someone else's battery and start the car using their battery. 2. Alternatively, remove the battery and take it to a battery shop for charging. Since the battery is completely dead, short-term driving won't fully charge it; a longer charging period is required to restore its capacity. 3. If the car battery is dead and the door can't be opened with the remote, you can also try using the mechanical key to open the door. The working principle of a mechanical door lock involves using the mechanical energy from turning the key to drive the gears and achieve the opening or closing of the door. The basic components of a mechanical door lock mainly include the door lock switch, door lock actuator, and door lock controller.
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How to Clear the Tire Pressure Monitoring Warning?

There are generally three methods to clear the tire pressure monitoring warning light: 1. First, check and confirm whether the tire pressure is normal. If there is an issue, adjust it to the standard pressure, then drive a few kilometers. Usually, the system will automatically correct and reset at this point. 2. Another method is to verify that the tire pressure is normal and then visit an automotive service shop to have the tire pressure sensors checked and the fault codes cleared. 3. The third method involves manually resetting the system by locating the settings button on the central console, typically by pressing the SET key. The functions of tire pressure monitoring are as follows: 1. Prevent accidents. Driving safety is paramount, and the tire pressure monitoring system is an active safety device. It can alert the driver in a timely manner when there are signs of danger in the tires, prompting them to take appropriate measures, thereby avoiding serious accidents. 2. Extend tire lifespan. With a tire pressure monitoring system, you can ensure that the tires always operate within the specified pressure and temperature ranges, reducing tire damage and prolonging their service life.
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How to Reset the Maintenance Reminder Light on Changan Suzuki Alto?

To reset the maintenance reminder light on Changan Suzuki Alto, follow these steps: 1. Turn off the engine; 2. With your left hand, press and hold the right button among the two knobs located at the lower part of the instrument panel; 3. With your right hand, turn the car key to the power-on and check position without starting the engine; 4. Keep holding the left button for 6-7 seconds until the system returns to normal, then release the left button. 5. At this point, the maintenance reminder has been canceled. Additional information about the maintenance reminder light: 1. When the maintenance light comes on, schedule a service appointment as soon as possible. Don't delay too long, as regular maintenance helps keep your new Alto in optimal condition. 2. Vehicle maintenance can also identify potential issues, preventing breakdowns during driving and enhancing personal safety to some extent.
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What is the correct way to start a Magotan?

The correct method for a novice to start a Magotan is: 1. Press the clutch pedal fully with your left foot. If the clutch pedal is not fully depressed, the clutch cannot completely disengage, resulting in a semi-engaged state between the engine's power output and the transmission. Shifting gears at this point will not only cause abnormal gear impact noises from the transmission but also damage the mechanical components. 2. Shift into 1st gear. 3. Turn on the left turn signal. 4. Honk the horn to alert surrounding vehicles or pedestrians. 5. Release the handbrake. 6. After finding the clutch engagement point, gently press the accelerator. The vehicle will slightly shake at this point. Then, move your left and right feet in opposite directions: slowly release the clutch pedal with your left foot while gradually pressing the accelerator pedal with your right foot. The movements should be smooth. Once the vehicle starts smoothly, you can remove your left foot from the clutch pedal.
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What Causes the Squeaking Noise in Haval H6 Brake Pads?

Haval H6 brake pad squeaking reasons are as follows: Unpolished old brake discs: When installing new brake pads, the old brake discs were not polished, resulting in improper fit. If the installation is not properly aligned or new pads are installed without polishing the old discs, the new pads will directly rub against the uneven surface of the old discs, ultimately causing uneven wear on the new brake pads. In fact, 90% of squeaking noises are caused this way. Solution: First, polish the edges of the brake pads to ensure they do not rub against the brake discs, which will eliminate the noise. If this doesn't work well, the brake discs must be polished and smoothed using a brake disc resurfacing machine to solve the problem. Brake pad material issues: If non-standard brake pads are used, the large particles in the brake pad material can easily cause squeaking noises during braking. Solution: Replace with high-quality brake pads, such as ceramic brake pads.
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