Geoff, there are no open ends on my vacuum lines. They look exactly the same way they always have. Cylinders 1, 2, 3, and 4 are connected, and run to the MAP sensor. There are two separate vacuum lines that run out of cylinders 2 and 3, they are connected on a T and run to the FPR. My last FPR was leaking into the vacuum lines. The one I have in there now is only a few weeks old. I have not removed any of the lines, and I checked them all again. There are no cracks or tears. There are no open ends. Maybe the FPR is the issue, but it's probably not the vacuum lines. Am I able to upload pictures to this site?