Car shaking when idle? Here's why
A car that shudders while it's just sitting at idle usually has a rough-running engine or worn mounts. Here's what causes it.
Common causes
- Worn spark plugs — a slight misfire shows up most at idle.
- Dirty fuel injectors — uneven fuel delivery makes idle rough.
- Worn engine mounts — the mounts that hold the engine wear out and let the vibration reach the cabin. Often worse when in gear at a stop.
- Vacuum leak — upsets the air/fuel mix and roughens the idle.
- Dirty throttle body or idle control — the engine can't hold a smooth idle.
How to narrow it down
- Shakes more when you put it in Drive at a stop → suspect engine mounts.
- Check-engine light on with the shake → likely a misfire (plugs/injectors).
Typical Dubai cost: plugs or a throttle clean are modest; engine mounts cost more.
Prices vary by car — get an exact quote first.
When to get it checked
A garage can scan for a misfire and check the mounts quickly. Ask for a free inspection so you get the real cause before replacing anything.
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