Okay let's start with what's wrong. I've noticed the car is knocking when shifting below 2k rpm, that is the only time it occurs. I've replaced all the 02 sensors and am thinking the injectors might be going. It has headers, cat back, 75mm pro mass, TB upgrade/optimized, dmd.
Could use some insight here guys. It throws almost all CEL codes. And runs quite sluggish. thanks
