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Does an Automatic Transmission Car Have Idle Speed?

2 Answers

SanMichael

09/02/25 5:41am

An automatic transmission car does have an idle state. The idle state of an automatic transmission refers to a working condition where the engine of an automatic transmission car is running without load. Below is relevant information about automatic transmission idle: Introduction to Automatic Transmission Idle: Idle speed refers to the engine running without any load, only overcoming the frictional resistance of its internal components, without delivering power externally. The minimum speed required to maintain stable engine operation is called idle speed, which is one of the five basic operating conditions of an engine. For an engine with good performance, the idle speed is generally between 550 and 800 revolutions per minute. Precautions for Automatic Transmission Idle: When the engine is running, if the accelerator pedal is completely released, the engine enters the idle state. When adjusting the idle speed, the speed should not fluctuate abruptly, as this can cause premature wear to the engine. It is advisable to have the idle speed adjusted at an automotive repair facility.

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StIsabella

09/14/25 7:48am

I've been driving automatic transmission cars for over a decade, so idling is something I'm very familiar with. When the car is started but the accelerator isn't pressed, and the tachometer needle stays around 700 RPM, that's the idling state. It's most noticeable when stopped at traffic lights - you can feel slight steering wheel vibrations and hear the engine running quietly. However, it's important to shift to neutral during prolonged traffic jams. Keeping it in D gear while braking for extended periods can cause the transmission to overheat. Especially when idling with AC on during summer, fuel consumption can increase by up to 30%. Last time I was stuck on an elevated road for an hour, I could literally watch the fuel gauge dropping - broke my heart.

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How to Adjust the Headrest of a Car Seat?

First, open the car door and enter the vehicle. You will see two protruding headrests on the driver's and front passenger seats. Next, locate the adjustment button for the car seat headrest. The adjustment button is usually located next to the two support rods of the headrest or on the side of the headrest. Then, when adjusting the headrest up or down, you need to press the button at the bottom of the support rods with your hand. Finally, while holding the button, adjust the headrest up or down to a height that suits you.

Do Spark Plugs Affect Car Fuel Consumption?

Spark plugs do affect fuel consumption. If a spark plug is damaged, it can directly cause an increase in the car's fuel consumption. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its appearance. The condition of the spark plug can be judged based on the following color observations. 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 burning. If the spark plug is covered in oil or 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, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates the wrong heat range was selected or the air-fuel mixture is too rich, with oil seepage. Steps to replace a spark plug: Open the engine hood and lift the plastic cover of the engine. Remove the high-voltage wires, marking each cylinder's position to avoid confusion. Use a spark plug socket to remove each spark plug one by one. While removing, check for external debris like leaves or dust and ensure everything is 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 high-voltage wires according to the firing order, then secure the cover.

How to Adjust the Front and Back Position of a Car Seat?

Leave at least a finger's width of space between your head and the headrest to prevent head bumps during bumps. Also, ensure that your hands can comfortably reach the steering wheel and your feet can easily operate the accelerator or brake pedal. First, press the front and back adjustment button to push the seat backward, then test if you can comfortably reach the pedals. When pressing the brake pedal to the limit, your legs should still have a slight bend. Tilt the backrest slightly, but maintain a level line of sight. If there's a gap in your lower back, use a cushion. For additional tilt, add a headrest to keep your gaze level. If there are still any discomforts while driving, continue adjusting the seat.

What is the installation method for car seat covers?

Before installing the car seat covers, please check the quality of the seat covers, whether the stitching is sturdy, and if the length is appropriate. The front driver's seat cover usually has a headrest cover, which can be directly pulled down over the seat. Then, there is one or two buckles at the joint of the seat cover. Insert the buckles into the gaps of the seat by hand to prevent the seat cover from moving forward. Some buckles do not have small hooks but come with elastic bands. In this case, thread one end of the buckle through the gap and lock it with the other end. After installing the long seat cover, make sure to reset the seat belt. Insert the fixing clips of the long seat cover and backrest into the gaps, then smooth out the seat cover.

What to Do If the Small Green Book Is Lost?

When the motor vehicle registration certificate is lost, the owner of the motor vehicle should promptly apply for a replacement at the vehicle management office under the jurisdiction of the motor vehicle. Contact the original owner, who should personally drive to the vehicle management office with their ID card and driving license to apply for a replacement. The current owner must personally drive to the vehicle management office with their ID card and driving license to apply for a replacement. This is the only motor vehicle-related service that cannot be handled by a proxy. When applying, the owner of the motor vehicle should fill out an application form and submit proof of identity. For the replacement of the motor vehicle registration certificate, the motor vehicle must also be inspected. The vehicle management office should, within one day from the date of acceptance, confirm the motor vehicle, review the submitted documents and certificates, and issue a replacement motor vehicle registration certificate.

Is Transmission Fluid the Same as Gear Oil?

Transmission fluid and gear oil are not exactly the same. Generally, transmission fluid includes manual transmission fluid and automatic transmission fluid. Manual transmission fluid is collectively referred to as gear oil, while automatic transmission fluid has a higher grade and is also called drive fluid. Additionally, regular gear oil cannot be used in automatic transmissions. Transmission fluid is an oil product that keeps the vehicle's transmission clean, ensuring its proper operation and extending the lifespan of the transmission components. Gear oil is typically used in gear transmission mechanisms such as the steering gear, transmission, and drive axle of a car, differing from engine oil in terms of usage conditions, composition, and performance characteristics.

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