I posted awhile ago that I was having boost problems. All of a sudden one day I was only pushing 10 psi (previously 20 spike, holding 15 when I first installed my GIAC chip). I was told that I probably have a vacuum leak. Today I replaced the vacuum hoses and still the car only has 10 psi of boost and hesitates a lot. Even with the 10 psi of boost, the car does not move like it does with the stock chip pushing only 5 psi. What is wrong? What is my next step?