2004 Ford F-250 turbo

Feel the bottom of the blue boot that goes from the turbo is it ripped in half, if not check your intercooler and piping and failing that disconnect the ehxaust before the cat and road test might be plugged up. The hissing is from the presure not being able to go. The solinoid willl not cause a hiss. Check the black intake hose on the front of the manifold they always cracked