Why does the car vibrate when I start it?

Why does the car vibrate when I start it?

Recently, the issue of jitter when starting a vehicle has become a hot topic among car owners. Many car owners have reported that their vehicles vibrate significantly during cold or hot starts, and are even accompanied by abnormal noises, which has aroused widespread concern. This article will provide you with a detailed analysis of the causes and solutions to this phenomenon based on hot discussions and expert advice from across the Internet in the past 10 days.

1. Common causes of jitter when starting a car

According to car repair forums and social media discussions, the main causes of startup jitter can be summarized into the following categories:

2. Analysis of recent popular cases

1.New energy vehicle vibration controversy: Users of a certain brand of electric vehicles collectively reported motor jitters during cold starts. The manufacturer responded that it was caused by the battery preheating process and had been resolved through OTA upgrades.

2.Discussion on the effects of fuel additives: A popular Douyin video showed that after using clean fuel additives, the starting vibration of old cars was reduced by about 40%, triggering widespread discussions about carbon deposit cleaning.

3.Extreme weather effects: After the temperature dropped in many places in the north, the number of questions about cold start jitter in automobile forums increased by 200% in a single day. Experts suggested that engine oil with better low-temperature fluidity should be replaced in winter.

3. Comparison of solutions

4. Car owner’s self-examination guide

1.Simple diagnostic method: Record the fluctuation range of the tachometer when shaking. If it exceeds ±200 rpm, you need to be vigilant.

2.Listening to sound location: The "audio diagnosis" technique popularized on the short video platform shows that the metal knocking sound is often directed to the ignition system, and the dull vibration sound may be a problem with the machine's rubber.

3.OBD detection: Recent data from JD.com shows that weekly sales of household OBD detectors have increased by 150% and can read key information such as fault code P0300 (random misfire).

5. Latest suggestions from experts

1. The China Automobile Maintenance Association reminds: Vehicles driven for long-term short distances are more likely to accumulate carbon. It is recommended to drive at high speed (more than 30 minutes) at least once a month.

2. Research from the Department of Automotive Engineering of Tsinghua University shows that using substandard fuel will increase the probability of shaking by three times. Be sure to choose a regular gas station.

3. Insurance company data disclosure: The number of engine overhaul cases caused by neglecting startup jitter will increase by 17% year-on-year in the third quarter of 2023. Early diagnosis can save 70% of maintenance fees.

6. Preventive maintenance tips

• Replace spark plugs regularly according to the maintenance manual (nickel alloy 20,000 kilometers/platinum 40,000 kilometers/iridium 60,000 kilometers)

• Add regular fuel cleaner every 5000 kilometers

• Idle for 1 minute before stopping (especially important for turbocharged models)

• After starting in winter, warm up for 30 seconds before driving.

From the above analysis, it can be seen that although startup jitter is a common phenomenon, it may indicate serious problems. Based on recent hot cases and professional advice, car owners should promptly investigate according to specific circumstances to avoid small problems developing into major failures.