a/c on, vibration is crazy

[gride]

so when i drive, and turn on the a/c i get very very hard vibration in the car, the steering wheel is vibrating crazy, so is the door, and the dash, this is only caused when the a/c is on, what the hell is going on? my motor mounts arent in the top shape. i have a slightly dented radiator support member. is it to do with the tighting of the alternator? i dont know whats is wrong. please help people. need to fix that, vibration when i come to a stop with the a/c on.

[Gemini]

so when i drive, and turn on the a/c i get very very hard vibration in the car, the steering wheel is vibrating crazy, so is the door, and the dash, this is only caused when the a/c is on, what the hell is going on? my motor mounts arent in the top shape. i have a slightly dented radiator support member. is it to do with the tighting of the alternator? i dont know whats is wrong. please help people. need to fix that, vibration when i come to a stop with the a/c on.

I have kinda the same prob, but my vibration really light.

[mrvinyl33]

Does the idle also drop under 750rpm when this is happening?

[gride]

idle drops alittle, but after about a minute the idle tries to adjust itself, if i give it gas, to stay about 1000 its pretty light, i am going to adjust the screw on the idle position, but i think its more then that? why does it rattle my door, and dash and steering wheel, its pretty harsh, but once i turn off the a/c its back to no vibration at all.???

[mrvinyl33]

When that starting happening on mine the rpm's were under 700rpm when a/c was on with plently of vibration. I had the egr port cleaning service done (had lots of carbon buildup) which reduced this problem.

[optimusprime]

funny my car does this too but i have solid mounts LOL...

[accordaffair]

I don't think you can solve it completely, but new front and rear mounts will help, sides aren't as important AFAIK

[cp[mike]]

may want to try cleaning out the IAC valve with carb cleaner, see if that helps.