What Causes a Car to Stall at Idle?

1 Answers
DelOlive
07/29/25 3:40pm
The reasons for a car stalling at idle are: 1. Throttle body clogging, carbon buildup, or abnormal opening; 2. Fuel injector carbon buildup or clogging; 3. Spark plug burning or damage; 4. Use of low-quality gasoline leading to fuel pump blockage; 5. Insufficient combustion of the air-fuel mixture in the cylinder. Solutions for a car stalling at idle include: 1. Regularly cleaning the throttle body; 2. Periodically cleaning fuel injectors to prevent carbon buildup; 3. Replacing spark plugs; 4. Using gasoline from reputable gas stations. A car stalling at idle refers to the situation where the engine runs well from low to high speeds after starting, but stalls immediately when the accelerator pedal is released or first becomes unstable and then stalls.
Was this review help?
15
5
Share
More Forum Discussions

What is the full name of Subject One?

Subject One, also known as Subject One Theory Test or Driver Theory Test, is part of the assessment for obtaining a motor vehicle driver's license. According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," the test content includes theoretical driving basics, road safety laws and regulations, local regulations, and related knowledge. The total duration of the Subject One test is 45 minutes, and the test paper consists of 100 questions, including true/false questions and single-choice questions, with a full score of 100 points. The test paper is randomly selected and combined by the computer driver examination system in accordance with the proportion specified in the "Motor Vehicle Driver's License Work Standards." Content of the Subject One test: The test content includes theoretical driving basics, road safety laws and regulations, traffic signals, traffic rules, and other fundamental knowledge, as well as local regulations. The timing of the driver theory test is arranged independently by the local vehicle management offices. Notes for the Subject One test: Bring and present your ID card for verification by the supervising officer; mobile phones must be turned off when entering the test area; no loud noise is allowed in the test area; regulatory textbooks are not allowed in the examination room (or should be placed in a bag).
6
0
Share

Are there multiple-choice questions in Subject 4?

Subject 4 exam includes multiple-choice questions. Here are the relevant details: 1. Main content covers: safe and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident handling knowledge. 2. Exam structure: 50 questions are proportionally selected from the corresponding Subject 4 question bank based on the license type - 800 questions for car licenses and 1,023 for large vehicle licenses. Each question carries 2 points. The exam duration is 30 minutes, and making 12 mistakes (6 questions) will terminate the test. Question types include true/false (questions 1-10), single-choice (11-40), and multiple-choice (41-50). Exam questions comprise image-based questions, scenario identification questions, and text-based questions.
13
0
Share

How many days of study are needed for the subject one test?

Subject one study duration varies by individual, the key is whether you can score above 90 in mock tests. Here are relevant details: 1. Driving school: It depends on available test slots. The fastest timeframe is 1-2 weeks, the slowest over 3 weeks. If urgent, you can negotiate with the driving school. Subject one tests generally start at 8:00 AM with a 45-minute duration. 2. Notes: Must bring ID card, no bags allowed; Test time will be notified 1-3 days before the exam, keep your phone on, arrive punctually at the notified time.
15
5
Share

What causes the clutch to suddenly fail and become unmovable?

When the clutch cannot be depressed, it may be due to a failure of the clutch master cylinder. Here are the relevant details: 1. Clutch: It is the component in the automotive transmission system that directly connects to the engine. Its function is to smoothly engage or temporarily disconnect the engine's power from the transmission, reliably transmitting engine torque, allowing the driver to perform operations such as starting, stopping, and shifting gears. 2. Location: The clutch is located within the flywheel housing between the engine and the transmission, secured to the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the transmission.
4
4
Share

What is the difference between an expressway and an elevated road?

The differences between an expressway and an elevated road are as follows: 1. Speed limits vary: Expressways generally have a speed limit of 80, while highways typically have speed limits of 100-120. 2. Toll charges differ: Highways require toll payment for passage, whereas expressways are toll-free. 3. Control measures differ: Expressways should have a central divider between opposing lanes, with full or partial control at entry and exit points. Highways are dedicated roads for high-speed, lane-separated vehicle travel with full access control. 4. Design specifications differ: Highways require smooth alignment, minimal gradient, 4-6 lane widths, central dividers, high-performance asphalt or concrete pavement, and sturdy guardrails where necessary - features not required on expressways. 5. Coverage areas differ: Expressways serve as high-grade roads within cities or between cities and satellite towns with limited coverage. Highways connect cities over larger distances with broader coverage.
20
2
Share

Can you park on the roadside dashed line?

Roadside yellow dashed lines indicate that temporary parking is allowed, but prolonged parking is prohibited. Below are the relevant regulations: 1. Article 93: For violations of road traffic safety laws and regulations regarding motor vehicle parking or temporary stopping, law enforcement may point out the illegal act, issue an oral warning, and order immediate departure. 2. Article 56: Motor vehicles shall be parked in designated areas. Parking on sidewalks is prohibited; except for parking spaces marked in accordance with Article 33 of this law. When temporarily stopping on the road, vehicles must not obstruct the passage of other vehicles or pedestrians.
2
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.