GF's 1.8 DSM shakes violently at idle.

[rampridersrider]

My gf and I bought her a car last August which just so happened to be a 1994 Eclipse auto with the 4G37. It has been a kick ass car and is in great shape. The only problem that we have with it is that the whole car shakes at idle. It barely does it with no accessories on and in neutral or in drive, but once you turn on an accessory the car starts to vibrate. It really shakes with the AC on. You don't notice it at all while you are driving, but when the RPMs drop to idle it starts to shake again. So basically once a load is put on the motor it shakes. She told me the other day if the AC is on and she makes a hard turn the car would shut off. I am think it has something electrical going on like the alternator isn't putting out enough of a charge. Any insight would be appreciated. Thanks.

 

[vintagemuscle]

check for a vacuum leak.

 

[n0c7]

What are the RPM's at at idle? My Intrepid does this but I know I've got a vacuum leak. Different car, but vacuum leak will do it.

 

[1.8laser90]

Replace your engine mounts or see if any of them are bad. Bad engine mounts cause the engine to shake and if there broken like mine were it will shake violently like mine did when in gear and idleing or with acc. running. What rpm is the car idling at, it should be anywhere between 750-850 for the 1.8l. Also, another way to check ## mounts is to have the hood open and have some one look and see how much the engine shifts (or moves) when putting it in drive to reverse..