Davidzell

Ok, so I got a really bad miss under heavy acceleration, but once it gets to 4000 rpm it clears up and runs great. The only cel I got is for bank 1 sensor 1 and bank 1 sensor 2 O2. Its getting the fuel because its an exhaust backfire. And if possible does anyone know the timing advance ranges? At idle it sits around 19-23 for timing and around 46 cruising at 60 at 2400 rpm. 98 es300