HELP dead bettery leads to knocking
Okay well i left my key turned back last night and i woke up this morning and it was dead. tried jumping it for like 20 min and it wouldn't start. so i drove the jeep to work came home and tried to jump it again.. would almost get enough juice to start but wouldn't.. i pulled the battery out of the jeep and hooked it up and fired right up but now its sounds like i have a lifter knocking or something.. i just changed the oil about 3 days ago and it wasn't low before i changed it. the knocking is coming from the drivers side it sounds like but im not for sure im kind of afraid of leaving it run for a while PLEASE HELP!!