Why does the Audi A6 engine shake significantly when the air conditioning is turned on?

1 Answers
VanSkylar
07/29/25 7:53pm
The most common reason for engine shaking when the air conditioning is turned on is a dirty throttle body, which affects the engine. If the air conditioning is turned on at this time, it will increase the engine idle speed, resulting in steering wheel vibration. Common causes are as follows: 1. Excessive carbon deposits: This could be due to severe carbon buildup inside the engine, causing idle vibration when the air conditioning is turned on. 2. Ignition system issues: If there is a problem with the vehicle's ignition system, it's necessary to check the spark plugs and high-voltage wires. Abnormal operation of the ignition system can lead to this situation, causing idle vibration. 3. Unstable fuel pressure: Unstable fuel pressure in the vehicle's fuel system can prevent the fuel pump from supplying fuel properly, leading to poor fuel atomization or failure to open the fuel injectors, resulting in idle vibration when the air conditioning is turned on.
Was this review help?
10
5
Share
More Forum Discussions

What to Do If Your Driver's License Has Not Been Renewed for Over a Year?

If your driver's license has been expired for over a year, you must first take the subject one exam at the vehicle management office. After passing the exam, you can then renew your driver's license. Penalties for driving with an expired license: You are not allowed to drive a motor vehicle during the expiration period, otherwise it will be treated as driving without a license. If your driver's license has been expired for less than one year, you can renew it at any time, but if you drive on the road, you will face a fine of 200 yuan. If your driver's license has been expired for more than one year without renewal, the traffic management department will revoke it according to the law. If the expiration period is less than three years, you must retake and pass the subject one exam to restore your driving qualification. During this period, if you drive on the road, you will face a fine ranging from 200 to 2000 yuan. If your driver's license has been expired for more than three years, it will be completely revoked. If you want to drive again, you must retake the driver's license exam. Otherwise, driving on the road will be considered as driving without a license, resulting in a fine of 2000 yuan and administrative detention for up to 15 days.
4
2
Share

What happens if you don't attend the driving test after successfully scheduling it?

If you don't attend the driving test after successfully scheduling it, the test will be marked as a failure. The number of rescheduling attempts for the Subject 2 (parking skills) and Subject 3 (road driving skills) tests cannot exceed five times. If you still fail on the fifth attempt, all previously passed subjects will be invalidated. Additional information: Below is an introduction to the driving test subjects: 1. Subject 1: Road traffic safety laws, regulations, and related knowledge test (written exam). 2. Subject 2: Field driving skills test (practical vehicle test). Only pass/fail results are given. The test includes five mandatory items in sequence: reverse parking, parallel parking, S-curve driving, 90-degree turns, and hill start/stop. 3. Subject 3: Road driving skills test (on actual roads or simulated environments). 4. Subject 4: Safe and civilized driving knowledge test (written exam).
11
2
Share

What are the first, second, and third piston rings called?

An engine piston generally has three piston rings. The bottom one is the oil ring, the middle one is the carbon ring, and the top one is the alloy ring. Below is an introduction to the functions of piston rings: 1. Functions of the first and second piston rings: They maintain the seal between the piston and the cylinder wall, effectively preventing seizure caused by gas leakage between the cylinder and the piston or between the cylinder and the rings. They also prevent faults caused by the deterioration of lubricating oil. 2. Function of the oil ring: It scrapes off excess oil from the cylinder and forms a uniform oil film on the cylinder wall, reducing wear on the piston, piston rings, and cylinder. Additional information: Below are methods to identify the quality of piston rings: 1. The working surface of the piston ring should not have scratches, abrasions, or peeling. The outer cylindrical surface and the upper and lower end faces should have a certain level of smoothness. 2. The light leakage of the piston ring should be checked. The total length of light leakage gaps in several places should not exceed 1/3 of the cylinder diameter. Otherwise, the piston ring should be replaced.
2
0
Share

What are the effects of oil leakage from spark plugs?

The effect of oil leakage from spark plugs is poor ignition, causing the engine to malfunction. Steps to replace spark plugs: Open the hood, lift the engine's plastic cover, remove the high-voltage distributor wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. When removing them, check for external debris like leaves or dust and ensure they are cleaned thoroughly. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the removed high-voltage distributor wires in the firing order, then secure the cover. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its condition based on the following appearance characteristics. A normal spark plug's insulator skirt and electrodes appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plug is oily or has deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged—showing signs like blistering, black streaks, cracks, or melted electrodes—identify the cause of the damage, fix the issue, and replace the spark plug. Additionally, if the spark plug appears blackened as if smoked, it indicates incorrect heat range selection, a rich fuel mixture, or oil leakage.
1
4
Share

How to solve the problem of driver's door contact switch failure?

Solution for driver's door contact switch failure: First, try disconnecting and reconnecting the battery cable. If that doesn't work, you'll need to replace the door contact switch to resolve the issue. The door contact switch is a type of switch that controls electrical appliances based on the door's opening and closing. When the door is open, the switch is open; when closed, it's closed. It mainly controls the interior light, hazard warning lights, and the central locking system for sliding doors. The door contact switch in a car is generally installed in the door gap area, pressed when the door is closed and released when opened. Its function is to detect the door's open/closed status and provide status signals to the vehicle's control circuit. It can be used to control features such as the reading light, dashboard door status display, and door open warning light.
19
5
Share

What does 180turbo mean?

180turbo is the designation for Honda's turbocharged models, where 180 represents the maximum torque of 180Nm. Generally, 180turbo refers to Honda's 1.0T engine models. The main function of a turbocharger is to increase the air intake of the engine, thereby enhancing the engine's power and torque. This means that the engine can output greater power after being turbocharged, which can also enhance the driving experience to some extent. When using a turbocharger, it's important to pay attention to proper usage and maintenance, as it is ultimately a mechanical device that can be prone to damage in long-term high-temperature and high-speed environments.
17
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.