Why does the car shake particularly when starting in winter?

[McPeter]

There are several reasons why a car may shake during winter: 1. Low temperature: When the temperature is low, the exhaust pipe temperature also decreases. The oxygen sensor has a minimum operating temperature, so the vehicle's ECU cannot obtain accurate data, leading to errors in ignition and fuel-air mixture control. This results in reduced power output and shaking. If this is the case, there is no need to worry. After a cold start, wait 30 to 40 seconds for the vehicle to warm up, and the shaking will disappear. 2. Carbon buildup: Carbon deposits on the throttle body have a certain adhesion. For example, if the intended fuel injection is 100 units, carbon buildup may reduce it to 90 units, resulting in insufficient fuel for combustion and causing shaking. If the shaking is due to carbon buildup, cleaning the throttle body and fuel injectors usually solves the problem. New cars typically experience this issue after driving 30,000 to 40,000 kilometers under normal conditions. 3. Worn spark plugs: When spark plugs age, the ignition gaps vary, causing power discrepancies among cylinders and affecting performance, leading to shaking. Replacing the spark plugs resolves this issue. Most household cars use nickel-alloy spark plugs, which generally need replacement after 20,000 to 30,000 kilometers of normal driving. For platinum spark plugs, replacement is recommended after 40,000 to 50,000 kilometers.

[Fred]

I've been driving trucks in the north for several years, and every winter morning when starting the vehicle, I feel the engine shakes violently. Mainly because the engine oil temperature is too low, making it too thick, leading to inadequate lubrication. The engine pistons experience increased friction and don't operate smoothly. In cold weather, the spark plugs' ignition capability declines, causing uneven operation across cylinders. Additionally, the battery's power output drops in low temperatures, resulting in insufficient starting power and more noticeable shaking. I encountered this issue last year and found that the air filter was slightly clogged—it's prone to frost blockage in winter. I recommend switching to winter-grade engine oil and warming up the engine for several seconds before driving to allow oil circulation. If shaking persists frequently, a full inspection of spark plugs and wiring at a repair shop is necessary. Long-term neglect can accelerate part wear, leading to higher repair costs. These problems lessen in warmer weather, so pre-winter maintenance is crucial. I always schedule service appointments in advance.

[Katherine]

As a new driver last winter, my car shook violently when starting for the first time in cold weather. I panicked, thinking the car was broken. Later, a car-savvy friend explained that the battery's capacity decreases in cold temperatures, causing unstable voltage that makes the starter motor struggle, and the spark plugs fail to ignite properly, leading to shaking. Additionally, the fuel system's gasoline flows slower in low temperatures, and poor fuel injection worsens the issue. I bought a battery tester and found the old one needed replacement—after handling it, the car ran much smoother. Parking indoors or in a heated garage can also help. New drivers should avoid stomping on the gas pedal immediately; wait for the engine to warm up. It's advisable to check the manual and regularly inspect if the tire pressure is appropriate. Keep the battery clean and terminals tight, and seek professional inspections when necessary to ensure safe driving.

[Harvey]

When I repair my car myself, I find that winter starting vibrations mainly occur in the fuel system. The fuel pump works harder in low temperatures, and the fuel injectors are prone to freezing or clogging, leading to uneven fuel supply. Poor gasoline fluidity can cause engine instability. Spark plug carbon buildup makes ignition difficult in cold weather, adding to the problem. Cleaning the intake pipe and throttle body often helps, and adding winter fuel additives to improve fluidity is a simple solution. If the battery voltage is insufficient, it can also worsen the vibrations, so regular measurement and maintenance can prevent trouble. Observing whether the vibrations lessen as the weather warms up can aid in preliminary diagnosis. Safety first—don’t push through issues; replace parts or seek inspection promptly if problems arise.

[Mark]

The most dreaded issue when commuting by car every day in winter is the shaking upon startup, which is not only uncomfortable but also poses hidden risks. The reasons include increased oil viscosity due to low temperatures leading to insufficient lubrication, aging batteries with weak power causing ignition abnormalities, and component contraction increasing friction and instability. Ignoring this may lead to loss of control at high speeds or damage to other components. I adhere to quarterly maintenance, replacing winter antifreeze and testing voltage, with a focus on inspecting the suspension and brake linkage systems before winter. If shaking is accompanied by noise, it's crucial to stop immediately and investigate—never take it lightly and continue driving. Developing good habits, such as allowing the car to warm up slowly before starting, is the safest approach. Safe driving starts with attention to detail, protecting both yourself and your passengers.

[DiElaina]

Housewives often experience engine shaking when starting the car to pick up/drop off kids during winter, especially in cold weather. Temperature differences cause engine components to contract, increasing gaps and friction, while thickened oil flows poorly causing vibrations. Older vehicles' fuel systems are more prone to winter freezing that clogs fuel injectors. I recommend parking in garages, using remote start for warm-up, and switching to winter-grade oil with better fluidity. Regular maintenance like cleaning spark plugs and air filters every three months helps prevention. Don't ignore severe shaking - promptly visit mechanics to check battery or ignition coils. Small issues becoming major repairs cost much more - not worth the delay.