I have been loving my Focus as is for the past couple of years, but I rode in a friend's Focus RS that was on an E30 tune and it felt SO much quicker. There are two things holding me back from doing that myself. One, I only plan to keep the car for another year. Two, with Focus RS's not having the best reputation for reliability, I think it might be better to leave it stock. My friend's car (and he doesn't use this forum so I guess let me know if you have any suggestions and I'll pass it on) seems to get high ignition corrections and he sometimes has a hard time keeping his OAR at -1. I also helped him change his spark plugs and there was oil dripping from one of them, but that could just be from when they changed the head gasket.
Back to my car, I'm also curious about my battery. There are no typical signs that it's going bad, the car starts just fine every time and the voltage looked good when I tested it. But it's the original battery and there are a couple signs specific to the Focus that make me wonder if I should replace the battery. The first is that sometimes when I park on an incline, next time I start the car I get three warning messages saying the AWD, Drive Mode Select, and Hill Start Assist are disabled. Once I start driving they go away after a few seconds. From what I understand, this is likely a battery issue. The second thing is the Auto start/stop never does its thing.
Does anyone have any advice on either of those questions?
Back to my car, I'm also curious about my battery. There are no typical signs that it's going bad, the car starts just fine every time and the voltage looked good when I tested it. But it's the original battery and there are a couple signs specific to the Focus that make me wonder if I should replace the battery. The first is that sometimes when I park on an incline, next time I start the car I get three warning messages saying the AWD, Drive Mode Select, and Hill Start Assist are disabled. Once I start driving they go away after a few seconds. From what I understand, this is likely a battery issue. The second thing is the Auto start/stop never does its thing.
Does anyone have any advice on either of those questions?