Why does the Audi A6 shake after replacing the spark plugs?

1 Answers
VonAndrew
07/29/25 11:26pm
Audi A6 shakes after replacing the spark plugs because the cylinder wires were broken or not completely disconnected when removing the spark plugs, causing abnormal ignition; incorrect spark plug installation, such as not tightening properly (threads not aligned) or cylinder wires not inserted properly; cylinder wires not matched to the corresponding cylinders. If the issue is not with the spark plugs, it may be due to aging ignition coils leading to decreased performance. Related information: For the engine to function properly, continuous ignition and fuel injection are required, meaning the fuel injector sprays fuel each time the spark plug ignites. If the spark plug fails to ignite, the cylinder will lack fire when the valve closes, preventing the gasoline from igniting and causing the engine to stall. Methods to determine if the issue is with the spark plugs: When spark plugs malfunction, the engine will continuously shake, especially when the vehicle is moving or accelerating. If there is no shaking while driving, it is usually not a spark plug issue. Testing by revving the engine while stationary can also help diagnose the problem.
Was this review help?
8
4
Share
More Forum Discussions

How many kilometers can a Huanglong 600 run on a full tank of gas?

Huanglong 600 can run more than 200 kilometers on a full tank of gas, and it consumes 10 to 11.5 liters of fuel per 100 kilometers. Factors affecting the range of a car: How many kilometers a car can run on a full tank of gas on the highway depends on the car's fuel tank capacity, engine displacement, and road conditions. For example, a small car with a displacement of around 1.8 liters, consuming 8 liters of fuel per 100 kilometers on the highway, with a 55-liter fuel tank, can theoretically run 680 kilometers on a full tank of gas on the highway. The size of the fuel tank measures the vehicle's fuel capacity, and the size of the fuel tank is directly related to the vehicle's fuel consumption. Fuel tank precautions: The car fuel tank equipment can provide waterproofing and insulation. The car engine fuel tank is equipped with an exhaust hole and oil lines connecting the fuel tank and the carbon canister. It is necessary to clean the oil lines or replace the filter every 30,000 to 40,000 kilometers.
16
4
Share

What does the auto start-stop function mean?

Auto start-stop function, also known as the engine auto start-stop system. Simply put, it automatically shuts off the engine when the vehicle comes to a temporary stop during driving (such as waiting at a red light). When it's time to move forward again, the system automatically restarts the engine. This function helps reduce emissions and lower fuel consumption during traffic light stops or short-term parking. 1. Working principle: By installing an enhanced motor with idle start-stop capability on a conventional engine, the system completely shuts off the engine when idle stop conditions are met. When the vehicle needs to move again, the idle start-stop motor system quickly responds to the driver's start command, rapidly restarting the engine with seamless transition, thereby significantly reducing fuel consumption and exhaust emissions. 2. Advantages: The auto start-stop function also helps standardize driving behavior to some extent - it won't activate unless seat belts are fastened. Conversely, if seat belts are unfastened after stopping, the engine won't restart even if the brake is released or the accelerator is pressed.
5
4
Share

What are the differences between hot-melt tires and semi-hot-melt tires?

Hot-melt tires and semi-hot-melt tires differ in the following aspects: 1. Different properties: Hot-melt tires melt into a gel-like state as the tread temperature rises during friction with the road surface, providing excellent grip for vehicles. Semi-hot-melt tires can achieve grip close to that of full hot-melt tires when the temperature rises, with wear levels remaining within a controlled range. 2. Different grip levels: When semi-hot-melt tires reach operating temperature, the tread softens, generating high viscosity and thus improving grip. Semi-hot-melt tires feature more advanced tread designs that achieve the same drainage effect as regular tires even with reduced tread patterns. Hot-melt tires turn into a gel-like state when the surface temperature reaches 90 degrees Celsius, enhancing grip—this is the principle behind the warm-up lap in F1 racing. 3. Different characteristics: Hot-melt tires increase the contact area with the road surface, enhancing grip when reaching a certain temperature. Semi-hot-melt tires do not have this feature.
7
1
Share

Does the Magotan have a particulate filter?

Magotan does not have a particulate filter. The function of the particulate filter and the impact of removing it are as follows: Function of the particulate filter: The particulate filter is mainly used to capture particulate matter in vehicle exhaust to improve the quality of exhaust emissions and reduce air pollution. The particulate filter for diesel vehicles is called DPF, while for gasoline vehicles it is called GPF, both of which work on roughly the same principle. Impact of removing the particulate filter: All China 6 gasoline vehicles are equipped with particulate filters. Removing the particulate filter will result in failing the annual exhaust emission test. Although the particulate filter may slightly reduce vehicle output, the overall impact is not significant. For diesel vehicles, the particulate filter cannot be removed either, as it plays a crucial role in controlling emissions from diesel vehicles.
9
2
Share

What is the fuel tank capacity of the BMW 5 Series in liters?

The fuel tank capacity of the BMW 5 Series is 68 liters. Below are the detailed specifications of the BMW 5 Series: 1. Vehicle Positioning: The BMW 5 Series is a mid-size luxury sedan under the BMW brand, classified as a C-segment car. Its main competitors include the Mercedes-Benz E-Class, Audi A6L, and Cadillac CT6. The BMW 5 Series is available in both standard wheelbase and long wheelbase versions, with the long wheelbase version being domestically produced in China and the standard wheelbase version being imported. 2. Powertrain: The domestically produced BMW 5 Series is equipped with two types of engines: a low-power 2.0-liter turbocharged engine and a high-power 2.0-liter turbocharged engine. The low-power 2.0-liter turbocharged engine delivers a maximum power of 135 kW and a maximum torque of 290 Nm, paired with an 8-speed automatic transmission (8AT). The high-power 2.0-liter turbocharged engine produces 252 horsepower and a maximum torque of 350 Nm, also mated to an 8AT. The 8AT used in the BMW 5 Series is a product from ZF. 3. Suspension Type: The BMW 5 Series features a double-wishbone independent front suspension and a multi-link independent rear suspension.
3
1
Share

What Causes the Strange Noise from the Front of the Car After Turning Off the Engine?

This is a normal phenomenon. When the engine temperature is too high, even after the car is turned off and the key is removed, the water temperature in the engine does not drop immediately. The radiator fan continues to operate to dissipate heat, and the cooling system automatically activates to cool down the engine system. Once the water temperature reaches an appropriate level, the fan stops running. In other words, the car is turned off, but the fan is still working. Precautions after turning off the engine: 1. Do not remove external devices: Cars often have many external devices. Many times, people leave their phones connected to charge after turning off the engine, which is similar to listening to music—both drain the remaining power from the battery. If the battery is drained, the car may fail to start. 2. Frequent engine restarts after turning off: This issue often occurs with new drivers who may not be skilled enough, leading the car to stall automatically. In a panic, they repeatedly restart the engine, which can damage the engine and other components. 3. Start-stop technology: Start-stop technology is designed to reduce fuel consumption by turning off the engine when the car is stopped at a traffic light, thereby improving fuel efficiency. However, if the car automatically restarts after being turned off, it inadvertently increases fuel consumption. As a result, this feature remains controversial, and many users choose to disable it.
2
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.