I feel my engine pulsing, what could that be?

I have a 09 Honda civic lx and sometimes when i turn on my car or i'm on a stop sign, i could feel a pulsing vibration coming from my engine but it only does it on idle, what could that be?

A small Vacuum Leak is the most likely cause. If not, listen to Carson.

Put it out of it's misery

If it has 100,000 miles your spark plugs need changed.
If not listen to Geo.

Could be a dirty throttle body or mass airflow sensor.

All cars are like that. It's the same as your wife breathing while she's sleep. They all do that. What makes the vibration in your car at idle… It's called… The… Engine.

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