What Causes Intermittent Idle Vibration in the LaCrosse?

1 Answers
LeJourney
07/29/25 8:51pm
Intermittent idle vibration in the LaCrosse may be caused by engine misfiring or insufficient battery voltage. Engine misfiring causing vehicle vibration: Misfiring refers to a condition where one or more cylinders in a four- or six-cylinder engine are not functioning or functioning poorly. This leads to unstable power output from the engine, resulting in vehicle vibration. The simplest diagnostic method for engine misfiring is the "cylinder cut-off test." Idle vibration caused by insufficient battery voltage: Turning on the headlights increases electrical load, and holding the window switch after the glass reaches the top causes the window motor to stall, rapidly multiplying the current. Both situations can lead to a drop in the vehicle's overall voltage. In response, the generator's voltage regulator increases the excitation current to raise the voltage. The increased excitation current raises the generator's operational resistance, which in turn lowers the engine speed, causing fluctuations.
Was this review help?
12
5
Share
More Forum Discussions

What Does Inline Engine Mean?

An inline engine refers to an engine where all cylinders are arranged side by side in a single plane. It features a simple cylinder block and crankshaft structure, uses a single cylinder head, and has advantages such as lower manufacturing costs, high stability, good low-speed torque characteristics, and lower fuel consumption, making it widely used. The downside is relatively lower power output. Inline engines are commonly abbreviated as 'L'; for example, L4 stands for an inline 4-cylinder engine. The inline layout is currently one of the most widely used cylinder arrangements, especially in engines with displacements below 2.5 liters. In this layout, all cylinders are aligned at the same angle and arranged in a single plane, resembling a straight line of cylinders standing in a column. Engines with an inline cylinder configuration are more compact in size, allowing for more flexible layouts and easier installation of superchargers and similar devices.
20
3
Share

What are the Japanese luxury car brands?

Japan's three major luxury car brands are Honda's Acura, Nissan's Infiniti, and Toyota's Lexus, all of which were born in the North American market without exception. Below is a related introduction to Japanese luxury car brands: 1. Lexus: Lexus (LEXUS) is a globally renowned automotive brand under Japan's Toyota. Lexus entered the domestic market relatively early, so as far back as the era when it was called 'Lingzhi,' it already had a good market share due to its excellent comfort and stability. 2. Infiniti: With its avant-garde design, outstanding performance, and thoughtful service, Infiniti quickly became one of the most important brands in the global luxury car market. Infiniti's logo represents an infinitely extending highway, with two straight lines symbolizing the path to the pinnacle, embodying infinite development. 3. Acura: When Acura first entered China, it was not called 'Acura' but was directly transliterated as 'Akula.' Acura is a high-end subsidiary brand under Japan's Honda Motor Company, established in the United States in 1986. The name Acura is derived from the Latin word 'Accuracy' (precision), and its logo features the image of a caliper used in engineering measurements.
6
0
Share

What Are the Reasons Why the Car Charger Doesn't Respond When Plugged In?

Reasons why the car charger has no power: 1. The car charger is not installed properly: The car charger needs to be fully inserted into the cigarette lighter socket until a clicking sound is heard, at which point the indicator light on the car charger will illuminate. 2. The cigarette lighter or car charger is damaged: Check if the fuse at the cigarette lighter socket is blown. You can also use the original car cigarette lighter to determine if the socket is functioning properly. Here are some precautions regarding car chargers: 1. Do not use the car charger in a humid environment. 2. Do not store the car charger in a humid environment. 3. The suitable operating temperature is 0-45°C. 4. Keep it away from children. 5. Avoid lightning strikes. 6. Unplug the charger promptly after charging is complete.
13
4
Share

How Long Does a New Car Need to Break In?

The break-in period is generally about 500 kilometers of driving. Here are some precautions to take during the break-in period: 1. Avoid emergency braking: Emergency braking not only shocks the braking system during break-in but also increases the impact load on the chassis and engine. It is best to avoid emergency braking within the first 300 kilometers of driving. 2. Avoid overloading: Running a new car at full capacity during the break-in period can damage the components. Therefore, within the first 1,000 kilometers of driving, the load should generally not exceed 5%-80% of the rated capacity. 3. Avoid long-distance trips: Long-distance trips during the break-in period increase the continuous working time of the engine, which can easily cause wear on the components. 4. Avoid changing the oil too early: The initial oil in a car is specifically designed for the break-in period, with low viscosity, excellent heat dissipation, cleaning, and oxidation resistance properties. Some oils even include grinding agents that aid in the break-in process. Therefore, during the break-in period, change the oil only according to the manufacturer's specified time and not too early. 5. Avoid starting without warming up: A new car must be warmed up before starting. Warming up essentially gives the engine sufficient lubrication time, especially for turbocharged models, which need to be warmed up before starting.
4
5
Share

What Causes Yellowing of Tires? How to Clean Them?

Automotive tire yellowing may be caused by brake pad powder-like metal rust adhering to the tire sidewalls, traces of dust, oxidation and yellowing of tire wax, premature oxidation of tire care products, or premature aging of rubber. When tires turn yellow, it is recommended to use a high-quality hard-bristle brush, citrus degreaser or V3 iron remover, and tire care products for cleaning. Below are the related scenarios: Brake Pad Powder-like Metal Rust: Since brake pads contain iron, they wear down and produce powder during braking. When this powder comes into contact with water, it forms rust water that flows onto the tire sidewalls. Over time, the sidewalls will turn yellow. Traces of Dust: If the tires frequently enter and exit construction sites, the sidewalls are highly prone to yellowing. Without a regular habit of cleaning the vehicle, the tire rubber may absorb a yellowish tint from the dust, which is very difficult to clean. However, this is a normal yellowing condition. Oxidation and Yellowing of Tire Wax: New tires are coated with a layer of tire wax. For vehicles often parked outdoors, the sidewalls are susceptible to yellowing due to the oxidation of tire wax under high temperatures in open-air environments. Another scenario is when low-quality tire wax is used, which may also cause tire yellowing. Premature Oxidation of Tire Care Products: Premature oxidation and yellowing of tire care products is an abnormal phenomenon. In most cases, when tire care products are applied directly without thorough cleaning, it accelerates their oxidation, leading to yellowing. Premature Aging of Rubber: This phenomenon mostly occurs when the vehicle is parked under direct sunlight for extended periods. Over time, the tire rubber will show signs of premature aging and turn yellow.
13
1
Share

What to Do If 12 Points Are Deducted During the Probationary Period?

If 12 points are deducted during the probationary period, you need to reapply for a driver's license, which means starting over from scratch, retaking all exams from Subject 1 to Subject 4. More details are as follows: 1. Legal Provisions: Deducting 12 points during the probationary period will result in the revocation of the driver's license. Article 69 of Order No. 123 stipulates: If a motor vehicle driver accumulates a record of 12 points during the probationary period, the driving qualification for the probationary vehicle type will be revoked. If the revoked driving qualification is not for the highest permitted vehicle type, the highest permitted vehicle type driving qualification will also be revoked. 2. Additional Information: For drivers holding A1, A2, A3, B1, or B2 class permits, if they accumulate 6 or more points but fewer than 12 points during the one-year probationary period, the probationary period will be extended by one year. If they again accumulate 6 or more points but fewer than 12 points during the extended probationary period, the driving qualification for the probationary vehicle type will also be revoked.
4
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.