My 2002 ford focus zx5 vibrates entire vehicle on startup.

any check engine light? any codes present? it sounds like you may have a bad idle air control valve.and as far as the vibration,that is very common on these cars and what I have discovered is that it is usually caused by the lower rear transmission mount going bad.but fix the high idle issue first.try disconnecting the battery,first positive then negative for about 15 minutes,then hook it back up, first negative then positive and drive it for a day and see if it improves any.

there is no check engine light on and I have had an idle air control valve placed on the ford focus zx5.

I have the se problem!! Does yours jerk into reverse??

you may have a vacuum leak,possibly at the manifold or p.c.v. valve.i would suggest that you take it to a shop to have a smoke test done to check for any vacuum leaks when it is cold.

Now my car won't go into reverse at all...still a vacuum leak??

no,i think you have bigger issues now.