NEW OWNER! (whatre the symptoms of a...)

[skunk]

I know i keep saying this to diffrent people, but this sounds like a cracked turbo. As the crack around your wastgate port gets bigger you will lose more and more boost, but if the previous owner checked the wastegate could just be cloged cat listen for a clicking coming from your number one cat, and some times you can actually smell it, it smells like rotten eggs or sulfur, or might be your actuator. good luck