I test drove a 2002 Civic Si Hatch and it would start to vibrate. I asked the owner what this was and he said the Si's have problems with AC and they tend to vibrate when on. So I turned it off and sure enough it stopped and I played with it a couple times and it would stop everytime. How normal is this because I've never heard of it?

Thanks.

 

First off ... there is no AC problem ... so don't worry about that.

Yes, the car will vibrate some with the AC compressor running ... this is especially noticeable if the car has upgraded motor mounts or an engine torque dampener. Nothing to worry about ... this is very common with all 4 cylinder cars

 

i have a 03 ep3 and my ac vibrate in the back of my car my exhaust was raddling so i had to weld the exhuast