I broke my O2 sensor on the header so i guessed that was it. So i order a new one and a utec for later.It did not fix my problem. My car will start gose to 2k then dies sometime right away then sometime it will try to run but not long. It is real rich when it dose run. I put a up and down pipe ,short ram, pulley all perrin, headders, and now a utec. My problem was befor the utec was on it. The only thing i can think of is something with the mas on the short ram it is on the right way because there is only one way it gose on. Has anyone had this happen to them? if someone can help me i would be greatful.