Shakking problem

Hello, Shaking badly when stopped and/or in park gear is caused by an engine performance issue. For some reason, the engine will not run smoothly. One or more of the engine's cylinders could be misfiring -- not firing properly at idle, but under load perhaps all is working well enough for you to not notice a problem. Testing is necessary to find out if you have a fuel delivery problem (such as injector related), a spark problem (such as a coil that is leaking spark or not firing), a vacuum leak or even a base engine problem. Have a compression test performed to find out of the engine internally is OK. Something will clearly come up with utilizing proper test equipment which can measure cylinder performance also.