Toyota Repair: Body shake, toyota camry, accident check

Question
At idle my 89 toyota camry has a body shake, the shake smooths out with more rpm , the shake gets worse with a load on the engine (at idle) such as turning on the lights. The engine seems to run fine there is no stumble or any other sign that it has anything to do with timing or any setting on the engine. I have tried changing all of that with no improvement. I noticed a broken  passanger side motor mount and replacing it seems to have made matters worse. Do you think the other motor mounts are the problem or am I missing something else. I hate to just keep replacing mounts in the hope that one of them is the problem, darn things are expensive. Could the problem be some imbalance in the engine itself?
Thanks

Answer
If you have not replaced the large motor mount near the bottom of the radiator try replacing it, most of the time this vibration is caused by a bad motor mount, has the car been in an accident? Check also that no part of the exhaust system is making contact with the body and make sure that no metal part of any motor mounts is in contact with the frame or body.