Actually, that was exactly the problem with my car. The battery was constantly draining, sometimes recharging, sometimes over-charging. Several times the car would jerk like crazy for a few minutes, then die as soon as I slowed down. It was not the battery, alternator, starter or anything. I switched out the PCM and everything worked beautifully. I have a 1st gen, so it may be different for you. But, I picked up a PCM for 15 bucks, so if you have the chance, it is worth a try before you move on to more expensive/difficult things.