replied to the thread I need help..
" Did you drive it hard after the install? Sometimes it has to adapt a little. If you clear the codes does it still misfire? The jb4 biases O2 readings to get afr values closer to good, it doesn't touch post cat readings, dpfix does that if you have one. I'd clear codes, reset adaptations, see if it comes back. Maybe you damaged an O2 or maybe codes were from when it was swapped and you didn't clear them, or you lost a coil... happens all the time. "
Today, 11:18 PM