If your car shakes or judders when you press the accelerator, something is interrupting smooth power delivery. It’s usually fuel, spark, or wheel‑related — and most causes are easy to narrow down.
Common causes
- Spark plug issues
- Dirty fuel injectors
- Worn engine mounts
- Wheel or tyre problems
1. Spark plug issues
Misfiring spark plugs cause uneven acceleration.
Quick fixes:
- Check for rough idling
- Replace old plugs
- Inspect ignition coils
2. Dirty fuel injectors
Blocked injectors interrupt fuel flow.
Quick fixes:
- Add injector cleaner
- Use higher‑quality fuel
- Avoid running the tank low
3. Worn engine mounts
The engine moves more than it should.
Quick fixes:
- Listen for clunks when shifting
- Check for vibration at idle
4. Wheel or tyre issues
Uneven tyres cause shaking under load.
Quick fixes:
- Check tyre pressure
- Inspect for bulges or flat spots
What to try first
Add injector cleaner — it’s cheap and often works instantly.
When to call a professional
If the car judders at all speeds or the engine warning light appears.