Hyundai Accent 98 problem

Who can help me have a problem with my huyndai accent 98 is the following, the car has an oscillation and feels more when I turn on the air conditioning that could be the problem or if it is any piece that has to change.
The example is the following the velocimeter is not maintained when I turn on the air conditioning begins to tremble and when the air is off if it feels but less as if the car were going out, the other the car is good as long as you take care of it.

Ahhh they could tell me something else because when the air conditioning is turned on, the car loses strength is normal or has any damage or has to do with what I comment up.

Thanks

Key_sting

That it loses strength is normal, because when working the compressor takes strength to the engine. And that I almost turned off to idle is sure of the coil, it is ordered to the spark plugs and if it does not have much intensity ... even if you do not lose anything to clean the idle valve.

Hello, I advise you to see the cables, spark plugs and the step by step. This is responsible for raising motor revolutions when loads such as the air conditioning compressor and the alternator are applied. That does it by intipating more air to the admission. Limpial it !!

First of all, the alternator load and then the rest of the components.

If he went out for the alternator, he would have to start it with tweezers, right?