So to start, I’ve been chasing a little demon in my car for a minute now, car feels a little boggy and not quite as peppy as usual and I’ve not really been able to figure it out. Something tells me to check my injectors and fuel pump/filter thinking it’s fuel related, but I have also noticed a hairline crack in the top of my Red Top battery by the negative terminal post. This causes my “ABS Fault” light to come on for a half sec while starting if my car sits for a while. So for shiggles I decided to hook up a scan tool and still found no codes. Then I went to digging around and found 3 stored in the ABS through my scan tool and tested my battery, with no surprise, to find it needs replacing. Question is, could the battery be causing all the issues or should I still look into the fuel system for the bogging? Injector area on IM looks dirty for sure and my oil is a little strong with fuel. The codes are U2105-00, U2106-00, and C0800-03. Not sure if those are all from bad battery or not. Car is an 05 A4 with 80k miles. Cold Air Inductions box with Fast IAT, JBA cat delete, Borla S-type catback and a tune ( done prior to cat delete but no codes popped after deleting) Sorry if this is rambling on lol, hopefully someone has some helpful info. I plan on changing the battery anyway cause it’s cracked so maybe someone also has a recommendation for a good replacement as well. Thanks!