Why does the car start to shake when driving at 120 km/h on the highway?

To What Extent is a Car Considered Flooded?

It refers to motor vehicles where the water immersion depth exceeds one-fourth of the wheel height, and the bottom components of the body are in prolonged contact with water. Below are the relevant details: 1. Flooded vehicles: Depending on the extent of water immersion, a car is considered flooded if the water level exceeds the chassis, partially flooded if it surpasses the oil dipstick, and fully flooded if it reaches above the engine hood or dashboard. Generally, the first scenario, where only the bottom of the body is in prolonged contact with water, has minimal impact on normal vehicle usage. The latter two scenarios, however, are entirely different, as they can easily lead to rusting of body components, shortened lifespan, and reduced safety performance. If the vehicle's wiring corrodes or rusts, it may cause sudden engine shutdown due to short circuits while driving, with potentially unimaginable consequences. 2. Repair: Flooded cars can be repaired to some extent, but due to the susceptibility of internal gears, belts, and other components to corrosion, and the fact that engine equipment is not waterproof, the long-term effects of water damage are unpredictable.

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Will the Engine Stall if You Slam on the Brakes?

Slamming on the brakes can cause the engine to stall. The reason for the engine stalling when braking is due to the excessive braking force, which prevents the engine and transmission from disengaging in time. For automatic transmission vehicles, it might be caused by a damaged idle speed stabilizer valve, directly resulting in the idle speed being uncontrolled and unable to maintain normal operation. The reasons for brake noise without braking are as follows: 1. Use of low-quality or overly hard brake pads: If low-quality or overly hard brake pads are used, they will produce a squeaking sound when rubbing against the brake disc during braking. Therefore, it is essential to use high-quality brake pads when replacing them. 2. Presence of sand or foreign objects between the brake pad and brake disc: During normal driving, it is inevitable to pass through some complex road conditions. Due to the unique design of disc brakes, some sand and foreign objects may get between the brake pad and brake disc, causing noise during braking.

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How to Solve the Problem of a Battery Not Charging After Long-Term Storage?

Here are the reasons and solutions for an electric vehicle battery not charging: 1. Light sulfation: Perform balanced charging. You can carry out general activation charging (i.e., balanced charging) on the battery, usually lasting one to two days, to restore normal function. 2. Moderate sulfation: Perform "hydrotherapy" charging and discharging. "Hydrotherapy" charging and discharging is required to restore normal function. The specific method involves first adding pure water or dilute sulfuric acid with a density of 1.05g/cm3 to the battery until it reaches a liquid-rich state, then charging with a current of 0.05-0.018C2A for about 20 hours, draining the liquid, and then conducting a capacity test. Repeat the above steps until the battery capacity is restored. 3. Severe sulfation: Use a repair device. If the battery is severely sulfated, ordinary repair methods will no longer work. You can use the high-resistance repair function of a repair device to increase the voltage to above 10V before charging again, which may have a certain probability of reactivating the battery.

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What is the truth about the Speedmaster fuel catalyst?

Speedmaster fuel catalyst has some scientific basis for improving car performance, but these metal-rich particles can cause certain damage or effects on spark plugs, three-way catalytic converters, and engines. Benefits of the Speedmaster fuel catalyst: 1. More active fuel molecules: The Speedmaster fuel catalyst can make fuel molecules more active, allowing about 90% of the gasoline to fully combust in the cylinder within a short time. This results in relatively more work done during the explosion stroke, stronger crankshaft power, and increased mechanical energy. 2. Strong anti-knock properties: High-end cars with large cylinder compression ratios require higher-grade gasoline. The Speedmaster fuel catalyst creates a low-temperature working environment inside the engine cylinder, making it less likely for low-grade oil to produce high-temperature thermal compression combustion in high-compression-ratio engine cylinders. The fuel molecules inside the cylinder are more stable and controllable, with strong anti-knock properties. 3. Environmental protection: From an environmental perspective, Speedmaster injects new vitality into automotive fuel. During operation, the fuel's molecular activity is enhanced, allowing for full combustion and significantly reducing the emission of harmful substances in vehicle exhaust, thereby achieving energy-saving and emission-reducing environmental benefits.

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What is the fuel tank capacity of the 2012 Highlander in liters?

The fuel tank capacity of the 2012 Highlander is 72 liters, as officially announced. Owners of the 2012 Highlander can also check this information on the vehicle's configuration sheet. The 2012 Highlander requires 92-octane fuel, with a fuel consumption of 9.9 to 12.1L per 100 kilometers. A full tank can cover a distance of 595 to 727 kilometers. During daily driving, it is essential to monitor the remaining fuel level in the tank. This is typically observed through the fuel gauge inside the vehicle. Under normal circumstances, the fuel gauge accurately reflects the fuel level. The fuel gauge usually has 5 to 6 segments, and it is recommended to refuel when only 2 segments remain to avoid running out of fuel mid-journey. During actual refueling, the amount of fuel may exceed the marked capacity. This is because the manufacturer's specified tank capacity is measured from the bottom of the tank to a safe level, leaving some space from the safe level to the tank opening. This extra space ensures that the fuel can expand safely when temperatures rise without overflowing. If fuel is filled up to the tank opening, the actual refueling amount may exceed the marked tank capacity.

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What is the difference between 91w and 94w on tires?

Tire specifications 91w and 94w refer to the tire's load index and speed rating. The number 91 indicates the load index, meaning the tire can bear a maximum weight of 615 kg, while 94 represents a load index of 670 kg. The letter 'w' denotes the speed rating, indicating the tire's maximum speed limit of 270 km/h. Here's an example to illustrate the meaning of numbers and letters in a tire model: 225/60R1799H. 1. 225: Represents the section width, which is essentially the width of the tire tread. 2. 60: Indicates the aspect ratio, referring to the height of the tire's sidewall. 3. R: Stands for the tire type code, with 'R' representing radial tires. 4. 17: Denotes the rim diameter, meaning the tire is suitable for 17-inch rims. 5. 99: Represents the load index, indicating the maximum weight the tire can bear. A load index of 99 corresponds to a maximum weight of 775 kg. 6. H: Indicates the speed rating, showing the tire's maximum speed capability. An 'H' rating means the tire can withstand speeds up to 210 km/h.

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Why does the car start to shake when driving at 120 km/h on the highway?

To What Extent is a Car Considered Flooded?

Will the Engine Stall if You Slam on the Brakes?

How to Solve the Problem of a Battery Not Charging After Long-Term Storage?

What is the truth about the Speedmaster fuel catalyst?

What is the fuel tank capacity of the 2012 Highlander in liters?

What is the difference between 91w and 94w on tires?

How Long Does It Take for Electrical Circuit Failures to Appear in Flood-Damaged Vehicles?

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