Compressor, Engine or Spark plugs ?, What is causing this....?
 

Hi,

I have a 2006 Civic FD

Lately, I have observed that when I turn the car on and switch on the AC, there is engine vibrtion felt thru steering. This happens in the following scenarios:

- When switching between gears, P, N & D, always there is 1 vibration just as gear is switched
- When slowing speed and coming to a halt [minor vibration]
- When picking up speed from a stop [minor vibration]
- When in Neutral, there is a series of vibrtion, seems to be manufacturing method to keep engine out of stress or something, is it normal ?

One more thing is that when ever I'm driving I feel that the AC, randomly, is just blowing air instead of cool air every 10 mins, this is also constant I don't know if this is normal ?

The thing is that I hve driven Porsche, Mercedes, Golf, Escalade, Toyota but none of these issues regarding to AC were there.

So its either the AC Compressor, the spark plugs or something linked to the engine.

Anybody with experience willing to share his knowledge ?

Thank You