My car keeps draining my battery. The car drives fine when I start it and take off the negative from the battery so I know its not my alternator. But I just replaced the battery and it is still doing the same thing. It would start but not fully drive it would lagg until I take off the negative then it'll run good again. What is my problem?

 

bad ground. high mileage cars can have severely corroded grounds, broken grounds, or i've even seen them completely removed by previous owners for some reason. check and replace all your grounds. get some good quality coated battery/amp power cable and re-loom all your grounds, hell add some while you're add it.

 

bad grounds and you may have something like ur glove box likt staying on or something