Why Your Car Shakes When Accelerating
When your car shakes during acceleration, it’s almost always caused by a component that’s under load — such as the engine, axles, wheels, or fuel system. Ignoring the vibration can lead to bigger repairs, so it’s important to diagnose the issue early.
1. Worn or Unbalanced Tires
Tires are the most common cause of acceleration vibration. If they’re unbalanced, cupped, or unevenly worn, the shaking becomes more noticeable as speed increases.
Check for:
- Uneven tread wear
- Missing wheel weights
- Low tire pressure
For more general troubleshooting, visit our Car Issues page.
2. Damaged CV Axles
If the vibration is strongest during acceleration and accompanied by clicking when turning, a worn CV axle is likely. This is especially common on front‑wheel‑drive vehicles.
3. Engine Misfires
A misfiring engine can cause shaking when accelerating because the cylinders aren’t firing evenly. Common causes include bad spark plugs, ignition coils, or clogged fuel injectors.
Learn more about engine-related symptoms in our Engine Performance & Fuel System category.
4. Dirty or Failing Fuel Injectors
Clogged injectors disrupt fuel delivery, causing hesitation and vibration under load. Using a high-quality fuel system cleaner can sometimes help, but severe clogging requires professional cleaning.
5. Bent or Damaged Wheels
Hitting a pothole or curb can bend a wheel, causing shaking that gets worse the faster you accelerate. A wheel shop can check for bends using a balancing machine.
6. Worn Motor Mounts
Motor mounts absorb engine vibration. When they fail, the shaking becomes noticeable during acceleration, especially from a stop.
When to Seek Professional Help
If the vibration is severe, sudden, or accompanied by burning smells, warning lights, or loss of power, stop driving and get the vehicle inspected. You can review related symptoms in our Warning Lights & Dashboard Alerts section.