Originally Posted by ND120883
perhaps part of it is weakening engine mounts? The AC will make the RPM's dip, however the effect is only worsened by bad mounts. So is the case with my vehicle. how bad is the shaking?
GoldHonda95 is right. If your car is shaking bad, then most likely your engine mounts are all gone. Also, when you turn on your ac your engine needs to go faster to turn the belts that go to the compresor, that is why your engine shakes, but if you had good mounts then it wouldn't! Also, since the engine goes faster more gas is burned, so for me I leave the AC off unless it is extremly hot! Also the engine powers the belts that turn the alternator that the ac runs off of, so there is more RPMs from your engine.