Quote Originally Posted by 1BadCC View Post
Could it be the tune. Its in need of a tune pretty bad. Those plugs had 20k on them. What should my AFR be
There isn't really a correct answer to that question. A completely stock vehicle will be trying to reach stoich or 14.7:1 However you may reach the best or safest power at other ratios. What is your current AFR? Who tuned your vehicle as is right now?