Originally posted by MapOfTaziFoSho:
I started bucking at 80k. But it goes away after the secondaries kick in. ... I drive the car a whole lot of never.



This sounds like:

1) Dirty MAF
2) Air leak - check that accordian tube, & have you ever removed the UIM/LIM? If so, 80k sounds like a good time for a few gaskets.

Must be that jumbly-wumbly thing happening again.