After I adjust the idle I turned off the car then start it back up to make sure it idles right. And I put the car in reverse and is dies Immediately . I tried to start it up agian and nothing. The only way I can get it started again is to disconnect the battery to reset the computer. Does anybody have any ideas on how to fix this.

 

You probably didn't follow the procedures to adjust the idle.

Use this:
http://www.f-body.org/oldfaq/html/te....html#iacreset

Pay very close attention to the last 2 sentences in the 3rd paragraph.