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What Are the Causes of Car Idle Vibration?

1 Answers
SanPresley
07/29/25 9:01pm
Car idle vibration can be caused by spark plug failure, excessive carbon buildup, or fuel supply system issues. Spark Plug Failure: Spark plugs are wear-and-tear parts. They need to be replaced when excessive carbon buildup or excessive ignition gap is detected. Excessive Carbon Buildup: Idle vibration during car operation is often caused by carbon deposits. During engine operation, carbon deposits can form on the throttle body and fuel injectors. Excessive carbon buildup can lead to inconsistent air-fuel mixture concentration in the cylinders, which is most noticeable during cold starts. It is recommended that drivers ensure the cleanliness of the throttle body during daily driving. Fuel Supply System Issues: Malfunctions in the car's fuel supply system can cause unstable air-fuel mixture concentration, resulting in vibration during idle. It is necessary to promptly inspect the car's fuel filter.
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Can Coolants of the Same Color but Different Brands Be Mixed?

Coolants of the same color but different brands cannot be mixed. It is necessary to use the same brand of coolant, as different brands may have varying production formulas. If mixed, the multiple additives may undergo chemical reactions, rendering the additives ineffective. The method for replacing coolant is as follows: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipelines, with a particular focus on the five-way hose. The coolant flows through the five-way hose and is then distributed to different parts of the car to function. If there is any leakage of coolant in this section, replace the hose or re-secure the connection based on the situation. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir, then continue to fill the reservoir with water, allowing the water to flow continuously through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir may have a faint pink tint. Continue adding clean water until the water coming out is clear. Note: Remember to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new coolant through the radiator hose. Then, add another container of coolant to the coolant reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. At this point, the coolant level may drop slightly as some air is expelled from the cooling system. Add more coolant until it reaches the "MAXT" mark on the reservoir.
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What are the standards for Nisseki 0W20 engine oil?

Nisseki 0W20 engine oil standards include the absence of free water and sediment in appearance. The inspection items for Nisseki 0W20 engine oil are as follows: The inspection items for Nisseki 0W20 engine oil include kinematic viscosity, CC, density, flash point (open), pour point, total acid number, total base number, color, anti-foaming, total nitrogen content, and elemental content. The basic information about engine oil is as follows: Engine oil, also known as engine lubricant (English name: Engine oil), has a density of approximately 0.91×10³ (kg/m³). It serves functions such as lubrication and wear reduction, auxiliary cooling, sealing and leakage prevention, rust and corrosion protection, and shock absorption. It is often referred to as the 'blood' of a car. Engine oil consists of two main components: base oil and additives. The base oil is the primary component of lubricating oil, determining its fundamental properties. Additives are used to compensate for and improve any deficiencies in the base oil's performance, providing certain new characteristics, and are an essential part of lubricating oil.
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How to know if you've been photographed for crossing the solid line?

You can confirm if you've been photographed by receiving an illegal activity SMS notification or checking the violation records online. Generally, you will receive an SMS within 3 to 7 days. If there's no SMS and no violation record is found after 15 days, it means you either weren't photographed or the violation hasn't been processed yet.
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How to Set the Ambient Light Switch on the Avalon?

Click on the vehicle icon in the central control screen, then select the control option. Turn on the ambient lighting option (the small light bulb button) to activate the ambient lights. Click the small light bulb again to turn off the ambient lights. There are also options to adjust brightness and color, which can be customized according to personal preference.
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How to reset the wrench light on a Mustang T70?

Start the vehicle's engine. For non-push-to-start models, turn the key to the second position. Press and hold both the accelerator and brake pedals simultaneously for approximately 30 seconds. The dashboard will display a prompt. Release the pedals, then press them again. The dashboard will show another prompt, and the maintenance light will be reset.
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What to Do When Your Car Breaks Down and Needs to Stop During Night Driving?

When your car breaks down and needs to stop during night driving, try to choose a safe area to park. Ensure it does not affect the normal driving of other vehicles, then turn on the hazard warning lights to indicate a warning, and set up a warning sign.
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