There are a range of reasons why your car is juddering at speed. Your vehicle could have dirty fuel injectors, a damaged fuel pump, a blocked catalytic converter, a faulty mass airflow sensor, broken spark plugs, or even an accumulation of moisture.
A dirty or clogged fuel injector means the engine is likely getting less fuel than is optimal for combustion – and can lead to juddering when driving. Additionally, an imbalance in the fuel mixture (too much or too little fuel from the injectors) can lead to juddering, rough idling and engine hesitation.
Jerking a manual car, often caused by improper clutch control or shifting techniques, can be detrimental for several reasons: Wear and Tear: Frequent jerking can lead to accelerated wear on the clutch, transmission, and drivetrain components. This can result in costly repairs over time.
Vibration is usually caused by an out of balance or defective tire, a bent wheel or a worn driveline U-joint. You may find that the car shakes the car in an up and down motion. You may feel vibration through the seat, the steering wheel or even in the brake pedal.
Fuel injectors become dirty over time, so juddering may be the result of a build-up of dirt and grime. It may also mean that the fuel injectors of your diesel car are blocked. Cleaning and/or repairing your fuel injectors will not only stop the juddering, but it will also help your vehicle be more fuel efficient.
There are a range of reasons why your car is juddering at speed. Your vehicle could have dirty fuel injectors, a damaged fuel pump, a blocked catalytic converter, a faulty mass airflow sensor, broken spark plugs, or even an accumulation of moisture.
Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. Causes can include the engine overheating, incorrect spark plug heat range, a loose spark plug, incorrect ignition timing or too lean of an air/fuel mixture. The spark plug should be replaced.
Do not take chances when your car begins to shudder: take it in for repair and get to the root cause of what is causing your car trouble so you can resume normal driving as quickly as possible. If you've been driving and felt your car shudder as you accelerate, it may be a sign of a misfire or transmission slipping.
If you notice unusual vibrations in your vehicle, it's always a reason to be concerned. If your car vibrates while idling, the fix may be as simple as getting an oil change.
A clogged air filter can restrict airflow, causing the engine to run rich (too much fuel) and resulting in jerky acceleration. This one is easy to check and doesn't really need you to go to a mechanic. Just open up the air filter in the engine bay and change it if it looks dirty. Should take you 5 minutes.
These issues are especially dangerous as they result in reduced stopping power, which can lead to accidents. While you can still drive a jerking car if the occurrences are minor or few and far between, more frequent and stronger jerking when driving at constant speed could mean there are serious issues with your car.
One possible reason your car jerks while accelerating is low engine oil levels. Engine oil makes driving more comfortable because it lubricates the engine's moving parts.
Repair Costs for a Car That Jerks When Accelerating
Fuel Injector Cleaning: $75 - $300. Air Intake System Replacement: $200 - $700. Mass Airflow Sensor Replacement: $350 - $600. Accelerator Cable Replacement: $175 - $575.
Engine Misfiring
If your engine isn't running smoothly, it can translate to a juddering or shaky ride, whether whilst accelerating or cruising at a constant speed. Engine misfires, often caused by old spark plugs, a clogged mass air flow sensor or a failing coil pack can cause this.
One common cause of a shuddering car, especially when accelerating, is worn engine mounts. Engine mounts secure the engine to the frame and absorb vibration. As they wear out (typically after 5–10 years), the engine can shake more, causing noticeable shuddering.
To judder is to shake rapidly, almost vibrating.
Why is My Car Shaking While Driving? Vibration is typically originated by a defective or out of balance tire, a worn driveline U-joint or a bent wheel. You may find that the auto shakes in an up and down motion. You may feel the vibration through the steering wheel, seat, or in the brake pedal.
One of the most common causes for a car jerking is that spark plugs are old or worn out, meaning that they can cause incomplete combustion. As a result, this leads to a car engine misfiring and jerking during acceleration or when travelling at low speeds.
Unbalanced Tires
If your tires are not evenly weighted, it can cause your car to shake at various speeds, especially noticeable when accelerating. Getting your tires balanced by a professional ensures even distribution of weight around the wheel, rectifying the imbalance and smoothing out your ride.
If you begin to feel persistent shaking in your car, it's best that you get to the problem right away before continuing to drive. Continuing to drive with the shaking can result in further damaging parts, ruining your tires, and other costly problems that could be avoided by a quick trip to your mechanic.
No matter what type of car, truck, or SUV you drive, a transmission shudder is a common issue in the automotive world. You might feel a slight vibration under certain driving conditions, and the transmission is a likely culprit.
Every motorist has experienced a misfire at some point. It usually shows itself in the form of stutter, shudder type feeling, slower acceleration and loss of power. An idling car might vibrate a little more than usual in the event of a misfire.
But if you're inexperienced and hesitant to try the job yourself, it could be safer to have a repair shop, like AutoZone's Preferred Shops, do it for you. Rather than take a chance on damaging something and adding to the repair cost, it'll get done in a timely fashion by a professional.