Back in January my 02 WRX had a issue with starting. I can get in the car turn the key and it will start right up most times. Then there are times i get in it, turn the key and my whole gauge cluster dies out and it wont start or turn over ( acts like a dead battery )..... I cycle key on - off numerous times and finally it will start. A couple times i went under the hood wiggled the power and ground on battery thinking it might help. The terminals did seem a lil loose so i tightened them both up, but same thing still happens. Replaced all the grounds, and a new ignition switch, and the problem went away for about 2 months.
Now it is back again, had AAA come and the guy put a jump pack on the car and amazingly the car started up. But as soon as i shut it off it acts up again. Was told my battery had dead cells and that was the problem. So i went out and bought a new battery, installed it and cleaned all terminals. worked perfect for a day. Come out this morning and same problem all over again. Turn key on everything works, as soon as i try to turn the car over the whole cars electrical goes dead, as soon as i turn the key back off and on i have full power again.... Trying to love my 1st subaru but its getting harder by the day