Car shakes more when AC is on?

[tyzall1584]

Maybe because its cold. I get cold and shiver when the a/c is on sometimes too haha. In all seriousness, I think the seats vibrate more than most other cars anyway. When I am idling I can literally see the chair shaking, with or without a/c

[AutoItKing]

Originally Posted by izzue

Well guys i swear when i turn the AC on i feel that the chair vibrates more. I am not sure if its normal. Got my car new but you know... factory defects sometime

It's normal. The A/C compressor adds load to the engine, and to keep the RPMs the same, the ECU dumps more fuel. And hence the extra vibration. Pretty much every small engine will do it. Not very noticeable with big engines since they have more power/momentum.

[moha4tec]

Originally Posted by AutoItKing

It's normal. The A/C compressor adds load to the engine, and to keep the RPMs the same, the ECU dumps more fuel. And hence the extra vibration. Pretty much every small engine will do it. Not very noticeable with big engines since they have more power/momentum.

HI ALL ,1.6 forte 2010 sx ,i have no vibration on car seat
i only have this squizing sound and clarking sound ,no hisitaion at all.

[izzue]

I think I should note that it is not only when the AC is on. As soon as you turn on the fan the vibration can be noticed.

After all reading all your comments i believe it is quite normal

[pre2epic4g]

First post ever! I am so excited.... I noticed the vibration after turning on the AC for the first time on my 2011 SX Koup with 4200 miles while sitting at a traffic light... it super annoying but I still love my car

[BLFORTE]

ac on, idle raised to compensate for the added drain on the engine, every car on earth does this, usually the fan will come on which causes more drain on the engine, thus slight vibration.