top of page
Mechanic Locations

CAR JERKS & HESITATES WHEN ACCELERATING

Auto Mechanics | Vehicle Faq's | Car Jerks When Accelerating


Why Does My Vehicle Jerk When I Accelerate?


Experiencing jerking when accelerating your car? In this post, we’ll explore common causes of this issue, including transmission problems, fuel delivery issues, and engine misfires. We’ll also provide troubleshooting tips and advice on when to seek professional help to keep your vehicle running smoothly.


Understanding the Jerking Sensation

If your car jerks during acceleration—whether from a standstill or at various speeds—it can be alarming. You might feel a lack of control, as your vehicle hesitates, then lunges forward, making it difficult to gain or maintain speed. Ignoring this issue can be dangerous, especially if it affects your ability to drive safely.


car jerking on highway acceleration

Common Causes of a Car Jerking When Accelerating


Identifying the reasons why your car jerks on acceleration is crucial for resolving the issue. Here are some common culprits:


  1. Bad Spark Plugs: Aging spark plugs may struggle to ignite the fuel, leading to engine misfires and causing jerking during acceleration.

  2. Dirty Fuel Injectors: Clogged fuel injectors can restrict fuel flow, resulting in your vehicle shaking when you accelerate.

  3. Blocked Air Intake or Defective Mass Airflow Sensor: Insufficient airflow to the engine can cause misfiring, leading to jerking during acceleration.

  4. Worn-Out Accelerator Cable: A damaged cable connecting your gas pedal to the throttle can result in jerking as you accelerate.

  5. Moisture in the Distributor Cap: Accumulated moisture can cause misfires, affecting acceleration.

  6. Clogged Catalytic Converter: A blocked catalytic converter can hinder exhaust flow, causing your vehicle to jerk during acceleration.


What Does a Car Jerking On Acceleration Feel Like?


Understanding how your vehicle feels during jerking is essential. When accelerating, you might notice:


  • A sudden loss of power

  • The car pausing briefly before lunging forward

  • Difficulty in maintaining speed


Driving a car that jerks during acceleration can be hazardous, so it’s important to have it checked by a mechanic.


Vehicle Jerking at Different Speeds


Car Jerks at Low Speed

If your car jerks when accelerating at low speeds, spark plugs or the air intake might be the culprits. Consider an engine tune-up to address these issues.


Car Jerks at High Speed

Experiencing vehicle jerking at high speeds can be particularly dangerous. Potential causes include airflow issues due to a clogged air inlet or a faulty mass airflow sensor. Immediate inspection is recommended.


Car Jerks from a Stop

A car that jerks when accelerating from a stop may indicate problems with dirty fuel injectors or a clogged fuel intake. This can affect both idle performance and acceleration.


Jerking in Automatic vs. Manual Transmissions


Automatic Transmission: If your automatic car jerks when accelerating, it might point to a transmission issue, such as a malfunctioning solenoid.


Manual Transmission: For manual drivers, jerking could stem from improper gear shifting. Ensure you're fully engaging the clutch.


No Check Engine Light, Still Jerking?


A car can jerk without the check engine light illuminating. Issues like worn spark plugs may not trigger a light but still require attention. If your car shakes when you accelerate, it’s time for an inspection, regardless of the dashboard indicators.


Repair Costs for a Car That Jerks When Accelerating


If your car is jerking when you accelerate, don't delay in seeking a professional diagnosis. Repair costs can vary significantly depending on the parts that need replacement:


  • Spark Plug Replacement: $75 - $300

  • Fuel Injector Cleaning: $75 - $300

  • Air Intake System Replacement: $200 - $700

  • Mass Airflow Sensor Replacement: $350 - $600

  • Accelerator Cable Replacement: $175 - $575

  • Catalytic Converter Replacement: $1,000 - $3,000


Should You Sell or Fix a Car That Jerks When Accelerating?


If you’re frustrated with a car that jerks during acceleration, consider your options. Weigh the mechanic's advice against the vehicle’s age and repair costs. Sometimes, selling your vehicle may be more economical than investing in repairs.


Final Thoughts


If you're experiencing issues with your car jerking when accelerating, it’s essential to address them promptly. Whether it’s a minor fix or a more significant repair, early intervention can help ensure your vehicle remains safe and reliable.







bottom of page