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Car Shakes When Accelerating

A shake or shudder that appears when you accelerate and fades when you lift off usually points to an inner driveshaft joint, a misfire under load or worn engine mounts.

High risk

Have it checked soon. Driveshaft joints and misfires get worse over time.

Short answer · Why does my car shake when I accelerate?

If the shake comes only under load, look at parts that carry engine torque: inner CV joints on front-wheel drive cars, engine and gearbox mounts, and on rear-wheel drive the propshaft. A misfire under load feels similar and usually sets a code.

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Safe checks you can do

  1. Read the codesMisfire codes point to ignition or fuel.
  2. Notice the speed rangeDriveshaft shudder is often worst between certain speeds under load.
  3. Watch the engine moveHave a helper watch the engine while you shift between drive and reverse with the brake held; large movement means worn mounts.Keep firmly on the brake and stay in control.

Questions that narrow it down

  1. Is the engine light on or flashing?Misfire.
  2. Does it stop when you lift off?Driveline or mounts.
  3. Is the car front-wheel drive?Inner CV joints are common.

Possible causes

Listed without ranking. Use the questions above to see which ones fit your car.

  1. Worn inner CV jointShudders under acceleration.
  2. Misfire under loadPlugs or coils.
  3. Worn engine mountsThe engine moves too much.
  4. Propshaft or centre bearingRear-wheel and all-wheel drive.
  5. Wheel balanceUsually at all speeds, not only accelerating.

Questions about Car Shakes When Accelerating

Is a shaking driveshaft dangerous?

It can fail if neglected; have it checked soon.

Can tyres cause it?

Tyres usually cause vibration at certain speeds whether you accelerate or not.