Alright. For some time now I have had this problem. My car will have about 14hg vacum (idle) when she is first started and will stay around 14-15 till i boost hard on her. Then she will go up to 16-17. But after that first boost the rest of the day it will be at around 12-13. I cannot find this damn leak! Anyone have any ideas on what is going on, or the best way to find the leak? Compression is around 180 for all 4 + or - 5 lbs.