In the a.m when I go to start my car when it is cold it will not start I have to jump it. After that it will run all day and night. But once I tyrn it off and it sits it will not start. So what is the problem the battery has been checked and is ok. Please help.

battery (sometimes they can test bad depending what kind of test was done)

drain

 

simple test - disconnect the battery one night and go back out and reconnect it in the morning.

if it won't start every night....then starts one night after doing this....then you just diagnosed a battery drain.

 

any aftermarket or electrical work is likely drain point - stereo?

 

mutlimeter set to milliamps between the battery post and positive cable end will tell you how bad the drain is.  less than 50 milliamps is normal

 

then start pulling fuses until the drain goes away.

 

that takes just a couple minutes.

 

once you know what fuse it's on you track it down to the items on that fuse.