Ok so I have an 07 Outback non turbo 2.5i, well changing the headlight bulb I noticed the battery was bulging on the side and had leaked a little. That said I replaced it and now the car seems to idle a little higher. Before the change it sat and about 600rpm in drive stopped at a light now its seems to be setting at about 700rpm. Where should it be? I may just be crazy and not have paid that much attention.