The title pretty much says my question, I am running spartans tunes and I have a bad surge when I have between 3 and 10psi of boost. I can watch my fuel rail pressure jump between 10890 to 14565 when I am cfruising between 55 and 73. When the symptoms start they don't go away they get worse. Has any one had this issuse or know mayb a direction to point me in. Thanks