well it was sputtering under half throttle and it was falling on its face as soon as i hit peak boost. so i figured it was the fuel pump sinces it was a 220 lph and the stock 240sx fuel pump is a 225 lph. but no it was the CAS. like people siad it was gonna be somthing simple and when i find out im gonna be kicking myself in the ass for not thinking about it.