[humfrz]

Originally Posted by Suba-dude64

I've been burnt from work, but I need to get this thing running. My backup car, the 97 Impreza, has developed a nasty case of the vibrations. The BRZ battery was dead, I threw a new one in it and it started but idled pretty poorly with misses. I grabbed the OFT and of course it now runs smoothly with no codes still. What are the best parameters to monitor for something like this? Thank you for any insight

Sometimes when you replace the battery in these cars, it takes it a few miles to "learn" about the new battery, then the idle will smooth out.