So, yesterday I installed a FAST intake on an LS1 and on the drive home the car started surging real bad (vacuum leak?), but this was after 1.5 hours of driving. Then I pulled over and shut it off, then when I fired it up again the RPMs went to 4,000 (to the factory limiter in park) and would not come down. Do I have a massive vacuum leak or did some sensor come loose? If you guys have any ideas of things to check out, let me know. Do you think the actual bolts that hold it down could have come loose? I will probably have to take the thing off again....