Hey my problem is the car is not charging the battery brand new and everything I tried charging the battery with the charger it works but when I shut it off it wont turn back on its a brand new alternator b18 swap idk if its wires or what 97 coupe

 

When you say it won't turn back on, what exactly do you mean ??? No dash lights when you turn the key on ??? No click when you try to start it ??? How long did you drive it before shutting it off ??? Do you have good continuity between the charging post on the alternator and the positive battery post ???

 

When I put the key in and turn it everything turns on and does the normal beep. when I go to turn the key over it turns over and all that but wont start unless I charge the battery. I tryed to solve the issue by charging the battery and it will work but eventually it will die my guess is the car is not recharging the battery enough or a wire to the alternator is loose or bad I still have to check fuses it's kinda giving me a headache lol

 

Start engine, turn everything else off, and measure the voltage at the battery to see if the charging system is working.

This sounds more like a general engine problem such as low compression though. If the battery has enough power to crank the engine at all, it should start.