Well... I am sold. Just decided to buy a membership. With all the info i have pcked up here, i felt guilty /forums/images/graemlins/smile.gif... Ok, now with the question. We put a IROC TPI setup on my buddy's '86 shortbed. Problem is that after it warms up and the computer goes into closed loop mode, the power really cuts off. WHen it is cold it sounds really cool throught the glasspacks and hav a good set o' nuts. Then drops off when it starts to warm up. It is on it's 2nd O2 sensor, and that seems not to be it. He thinks it has the wrong injectors, and it is running lean. Does anybody have a clue?!