Car Shakes At Idle But Smooths Out While Driving – How To Fix This Problem?


09 February 2023


car shakes at idle but smooths out while driving

You might have noticed some irregularities with your car, like how it’s vibrating more than usual, even while idle. This can happen due to many reasons. Therefore, people should know the reasons behind why their car shakes at idle but smooths out while driving.

If you are looking for the answer to this question, then you have clicked on the correct link. In this post, you will learn why the above effect happens and what needs to be done to solve it.

Why Does Car Shakes At Idle But Smooths Out While Driving And How To Fix This Issue?

If you wish to know why your car shaking while idle, then there can be various reasons for this issue. Therefore, here are some of the most common reasons why your car shakes when idle:

1. The Motor Mounts Are Weak

As you already know, your engine is stored in the car’s engine compartment. This is done with the help of motor mounts that are attached to the engine to keep it in place.

When these mounts become weak, they might fall off one by one. This can create a situation where your car vibrates when idle. You can notice this the most when your car is in neutral.

If it does so, then you better go to a mechanic to get it checked and fixed immediately.

2. Damaged Spark Plugs

Spark plugs are connected to your engine and are responsible for igniting the fuel that goes in it. However, after lots of use, these spark plugs can become greasy due to the accumulation of residue from burnt oil. This can cause the engine to misfire.

Therefore, it’s best to keep in mind that your spark plugs are best replaced after every 20,000 to 30,000 miles. However, if you have a car that has a diesel engine, then there’s no need to worry about this since diesel engines don’t have spark plugs.

3. The Camshaft Timing Chain Is Loose

Many cars have a camshaft timing chain, which helps all the camshafts stay attached to your engine valves and pistons. This can create a problem for you if the timing chain for your camshaft has a loose chain tensioner.

If you don’t get all the hoses of your engine inspected by a mechanic, then your complaint about your car shaking when idle will never cease. This is because it can cause an engine vacuum leak, increasing the pressure inside its cylinders and vibrating your car. 

4. Battery Cables Are Loose

Another common reason why your car shakes at idle but smooths out while driving is because of loose battery cables. If you see your car wont start after getting gas, then this might be one of the reasons why.

This can happen if you recently changed your car battery. It can happen if the battery is not correctly connected to the battery cables. After driving around town, there is a chance that your battery cables might become loose, which leads to vibrating cars.

5. The Sensors Are Dirty Or Worn Out

Two primary sensors in your car that are essential for starting it up are – the throttle position and oxygen sensors. Since they are located so close to the engine, they get greased up over time, making them malfunction.

Adjusting the throttle cable a bit too tightly might cause the car to turn even while idle. Also, it makes things rough while driving as your car might speed up irrationally at times.

In the same vein, a dysfunctional oxygen sensor can lead to exhaust malfunctions. This can also be another reason why your car shakes while idle.

6. Faulty Ignition Control Module

Your car’s idleness can be disturbed if there are faults in the ignition control module. Here, your engine might not start since the control module wrongly sends a signal that makes your engine misfire the compression from your cylinders.

You can quickly diagnose this problem if you see your car vibrating on idle, even when you are not pressing the accelerator while in gear.

7. The Gas Cap Is Loose

One of the most common causes of your car shaking on idle is a loose gas cap. If the gas cap is loose, then air can leak inside, pressuring and vacuuming the engine even more. This increase in pressure can cause your engine to shake, even while the car is idle.

Therefore, try checking your fuel cap. Open it yourself and then put it back. If you see the cap is loose, then you have found the main culprit.

8. Malfunctions In The Fuel Intake System

If you see your car shaking when idle, then there is a high chance that the problem probably lies in your fuel intake system. The more you drive your vehicle, the more wear and tear your fuel intake system suffers, leading to blockages and malfunctions.

Obstructions in your fuel intake valves can lead to less fuel going to your engine, which fails to start the engine properly. This leads to vibrations in your engine, which makes your car shake even while idle.

Therefore, ask your mechanic and allow them to implement the use of an OBD2 scanner to find car engine malfunctions. This scanner will quickly pick up any obstructions in the fuel intake system.

Frequently Asked Questions (FAQs):

Here are the answers to some questions that people ask alongside why is my car shaking when idle:

Q1. How Do You Diagnose Engine Vibration?

Ans: To diagnose the reason why your engine is vibrating, you can do the following:
First, place your car in a neutral state.
Slowly start increasing the engine speed to an RPM which makes it vibrate.

Q2. What Reduces Engine Vibration?

Ans: To reduce the vibration of your engine, you can try making the coupling more flexible than before. Here, changing the spring and the damper will work wonders.

Q3. Does Changing Engine Oil Reduce Vibration?

Ans: Yes, changing the engine oil can indeed reduce your engine and car vibration. This will be most noticeable if the engine has not been changed for some time. In addition, this is more prominent in two-wheelers than in four-wheelers.


There are various reasons why your car shakes at idle but smooths out while driving. It can be due to iffy motor mounts, gas caps, damaged spark plugs, and battery cables. In addition, your ignition control system might be faulty as well, alongside worn-out sensors.

In case you faced a similar situation, let me know in the comments below what you did!

Read Also:

Debamalya is a professional content writer from Kolkata, India. Constantly improving himself in this industry for more than three years, he has amassed immense knowledge regarding his niches of writing tech and gaming articles. He loves spending time with his cats, along with playing every new PC action game as soon as possible.

View all posts

Leave a Reply

Your email address will not be published. Required fields are marked *


Car Accident

Dos and Don’ts After a Car Crash

The modern world sees most of us rushing from one commute to another. The mass ownership of the automobile is brilliant for getting us from A to B – but is it all it’s cracked up to be after you have a car crash? We put together this shortlist of dos and don’ts for after a car accident to help guide you through the process. Being in a fender bender is bad enough, but if it’s your first time then you need some guidance. Let’s look more closely at what you should, and what you shouldn’t, do when you have a car crash. Crashing your Car: What you Should Know If you have been in a vehicular accident, then there are a few things you should make sure you do. Immediately after the Accident If the car crash has just happened then stop the car, pull over, and switch on your hazard lights as soon as it is safe to do so. You are legally obliged to stop and may be taken to court if you do not. Exchange details with other drivers and witnesses only after you make sure yourself and others are safe. Emergency services should also be called. Do: ensure the safety of yourself and others. Do: contact the emergency services if needed. Do: get the contact details of everyone involved. But… Don’t: admit responsibility (as this Portland car accident lawyer will tell you). Don’t: have lengthy conversations with other parties involved. These conversations can be used against you by defense lawyers and insurance companies. The Balance Small Business has a good article listing which specific details you should get from which parties. In the Days Following a Car Accident You should report to the local police station if you have not already been in touch with the law to report the accident. You should also get in touch with your lawyer or car accident attorney. They can file a car accident claim on your behalf and talk you through all the necessary legislation. If you are the offending party, then they will advise you on how best to proceed. It is likely that there will be a monetary cost to the accident, and they can negotiate a fair rate of pay on your behalf. It is advised that your role in the accident is to hand over the facts and let your attorney deal with it. Car accidents can become legally complex matters that you should not try to handle alone. Do: Seek out the police if required. Do: inform your insurance firm for the accident. Do: seek out a car accident lawyer. But… Don’t: try to negotiate any deals by yourself. Don’t: contact anyone involved in the crash after the affair. Car Crashes cost the US economy more than 230 billion USD annually, so you are not alone in crashing. However, if you follow these guidelines your car crash lawyer in Portland can assist you to get the best outcome from an already dire situation. Whether this is a monetary award for your medical bills or distress, or whether this is a reduced fine or minimal jail time. When you crash your car you probably need an attorney – and that is the moral of the story. Read also: Florida Car Accident Lawyer: The Ultimate Approach to Winning Car Accident Cases 4 Reasons Why You Should Hire a Car Accident Lawyer

N54 Engine

A Guide To Choosing The Best N54 Engine For Sale

Are you in the market for a high-quality N54 engine? Look no further! In this comprehensive guide, we will walk you through the process of selecting the best N54 engine for sale. Whether you're a BMW enthusiast or simply someone in need of a reliable engine, we've got you covered. Let's dive in and find you the perfect N54 engine! N54 Engine: A Brief History The BMW N54 is one of the landmark machines that elevated the name and fame of BMW. The BMW N54 was the first twin-turbo engine that was produced in huge numbers. The success of the machine is vindicated through the production at a mass scale. The supermachine debuted at the Geneva Motor Show in 2006. When it entered the market, it raised a lot of hype thanks to the specifications. Yes, the machines’ performance was extremely satisfactory. The user of the engine has all praise and admiration. One will be thrilled that the N54 bagged five International Engine of the Year performance. Also, the machine was recognized to be part of Ward's list of 10 best engines three times in a row.  Why Do People Love This Machine? There is no doubt that the N54 engine is of high class, and it went on to win the hearts of the people. Now, here we present some of the WOW factors that made the engine a class act. Let's try to understand it here.  Tuning Performance and Updates One of the biggest advantages of the BMW N54 engine is its power and potential. Yes, the twin-turbocharged engine offers enough power as it is. You could really get an N54 and if you add some more buck, then you can easily get a perfect engine with 600 hp in no time. There is no doubt that the engine’s performance is indeed great. It denotes you can get a high-quality engine if you spend on the specifications. All these make the engine highly special, to say the least. That's the USP of the particular variant. Various Applications The N54 engine first came into existence with the  BMW 335i in 2007. Thereafter, it went through a series of massive improvements. The evolution of the machine helped the manufacturer come up with different models and variants. Among the different variations, the most loved and praised one of them is the BMW 1 series. But another benefit that the customers reaped through the machine is that they got multiple choices. Now, whenever the users get choices, they will be impressed with the machine as well.  Reliability  The success of an engine depends to an extent, on consistent performance. Reliability is one of the most significant factors behind teh success of a machine. There is no denying the machine was suffering from different technical glitches.  The issues were mainly related to the high-pressure fuel pump and the fuel injector. Apart from it, there were also complexities with the components. Engine is one of the most complex machines. The organized performance and coordination of the major and minor elements make the machine strong enough. But with the team, the BMW N54 went on to evolve as one of the most successful machines in the industry.  Understanding the N54 Engine First, let's take a closer look at what makes the N54 engine so special. Manufactured by BMW, the N54 engine is a turbocharged, direct-injection engine that offers impressive power and performance. It is commonly found in BMW 3 Series models, such as the 335i. Let us discuss some of the core engine specifics of the N54 Engine  The BMW N54 engine is one of the core machines that is powered with features to combat the issues with a high compression ratio.  Let us discuss some of the engine specifications here. Firstly, you will find a Cylindrical head and block, and it is made up of Aluminium. Secondly, the engine configuration is Inline-6. Thirdly, you will get a displacement of 3.0l. The compression ratio is 10:2:1.  Furthermore, the engine is gifted with a peak horsepower of  335 hp (5900 RPM). The peak Torque is 332lb/ft (1500-4500 RPM). Apart from them, your N54 engine is decked with some other features that make the engine stand out and a machine of utmost power and performance. Factors to Consider When choosing an N54 engine for sale, there are several factors that you should consider: Reliability: Look for engines that have a strong track record of reliability. Reviews and testimonials from previous customers can help you gauge the overall quality and dependability of a particular engine. Condition: Opting for a used engine can be a cost-effective choice, but it's important to thoroughly inspect the condition of the engine before making a purchase. Consider factors such as mileage, maintenance history, and any potential modifications or repairs. Warranty: Many sellers offer warranties on their N54 engines for sale. Make sure to check the terms and duration of the warranty before finalizing your purchase. Related: Beginners Guide To Buying A Classic Car Where to Find N54 Engines for Sale If you're eager to get your hands on an N54 engine, there are several places where you can find them for sale: Online Marketplaces: Websites like Alibaba or eBay offer a wide range of N54 engines for sale. Make sure to read reviews and compare prices from different sellers to ensure you're getting the best deal. Specialized BMW Dealerships: BMW dealerships often have a selection of used N54 engines available for sale. Additionally, they can provide you with expert advice and assistance throughout the purchasing process. Car Enthusiast Forums: Online forums dedicated to BMW enthusiasts are a great resource for finding N54 engines for sale. Members of these forums often have first-hand experience and can provide valuable insights and recommendations. Conclusion Choosing the best N54 engine for sale requires careful consideration of factors such as reliability, condition, and warranty. Take the time to research different sellers and explore various options. With the right N54 engine, you can enhance the performance of your BMW and enjoy an exhilarating driving experience. Happy engine shopping! Read Also: 3 New Age Engineering & Construction Technology AutoTempest: Is It The Best Search Engine For Cars? A Close Look at Mechanical Engine Controls


How To Drive In Poor Winter Weather

Winter relieves the hot, humid conditions that characterize most of the world in the summer. However, they may significantly impact other aspects of daily life. You should take some precautions to protect both you and your vehicle during winter driving conditions because they can be dangerous. Top 5 tips to consider while driving Here are some pointers to help you travel safely and comfortably this winter. 1. Lane Driving is Safe Driving A rapid lane change by a driver is never safe, and it might be much riskier when it happens on a slippery, icy road. To get to your destination safely while driving in snowy or icy conditions with poor visibility, make sure you stay in one lane. A quick lane change might scare other drivers, giving them little time to respond, and it's very easy to cause crashes, which are frequently fatal. So that nothing unexpected or abrupt happens, avoid driving quickly to overtake on slick roads during the winter or when it is snowing. Also, watch out for climatic conditions and get reliable weather data from services like Visual Crossing Weather API, so one can better prepare for their journey. 2. Blink Your Indicators Those attractive lights on the outside of your car do more than make it look nicer. When driving in the winter or during a snowfall, always turn on the directional indicators before making a left or right turn. Using your signal lights when driving in snow or extremely cold weather is necessary because doing so extends politeness to other drivers and ensures your safety. When driving in these challenging winter circumstances with poor visibility, it is also advised to let your indicators blink continuously. This will make it easier for the vehicles following you to determine how far to back off to avoid an accident on slick, winding roads in the winter. Related Resource: 7 Things to Do When Driving In Bad Weather Conditions 3. Keep Your Windows & Windshield Defrosted Regularly clean the inside and outside of your windows and windshield for the best vision while driving. The outside fogging of the windshield and windows is one of the winter driving hazards. Visibility may suffer significantly, and accidents may happen. Removing fogged-up windshields as soon as possible during the winter is essential to avoid making a mess of streaks. As the air inside your car is already humid, dropping your windows for a moment will allow you to breathe fresh, dry air, which can help prevent windshield fogging. Therefore, regular cleaning is necessary to keep your vision clear enough to see the road in front of you and the traffic around you. 4. Watch The Road When you're driving in the snow, it gets harder to drive your car because it skids. So, to avoid skidding, improve your winter driving strategies. Aim for your destination rather than the direction your car wants to take you. By doing this, you can keep your wheels turning in the direction you want. Stay alert and maintain a safe gap between your automobile and the vehicle in front of you when driving on icy or snowy roads. The goal is to be vigilant, and by keeping in mind this advice, you'll have enough time to react in an emergency and prevent accidents on the road. 5. Avoid Speedy Driving Certainly, everyone enjoys the rush of traveling at speeds more than 100 km/h. But this driving stunt in the cold is a definite NO! Additionally, it is often unwise... Because of the reduced visibility and fog that comes with winter driving on slick or icy roads, you should pay close attention to the speedometer. You can respond more quickly and stop quickly while driving at a low speed. There may be times when you believe there is no vehicle in front of you. To avoid unpleasant surprises, keep your speed under control and account for poor visibility. Be careful not to accelerate quickly! Conclusion Keep in mind that the finest safety feature of your car is you. To ensure your safe arrival at your destination, take precautions. Never leave your car if you are stranded in an unexpected location. Ensure the exhaust pipe is not obstructed by snow, dirt, or other obstructions by lighting flares in front of and behind the vehicle. Read Also: Accident By Unlicensed Driver: How To File For A Compensation Claim? Used Cars In Tucson Offer You The Best Range Of Driving Options Great Summer Experiences For Truck Drivers