As of now I only have a cb, but it happened before as well. At idle I get a little "burble" as I call it. I'm sure you all know what I mean. But In neutral if i rev over 2500k, upon deceleration the car really stumbles, very rough pattern in between 2000 and 1500. At I idle I think I have a miss too. Sounds a little louder, shakes a bit more than the normal idle "bumps". Could this be a miss. BTW, I am having major boost problems as well, maybe a vacuum problem.