Quote Originally Posted by traildog View Post
This plug comes from the o2 sensor in the rear manifold. It was not plugged in. I unplugged the sensor in the DP, and plugged in the one in the rear manifold.

WHY?
That plug needs to go to the O2 sensor in your upper down pipe.
Like I said, forget that O2 sensor in the rear manifold is even there PULL IT OUT!