I was just having a boost problem all of the sudden......i could not figure it out. everyone told me to check for the restrictor pill and make sure it was there, and i didn't listen because My car had been boosting fine and I NEVER messed with those lines. However, as I got to my wits end, I decided to check it out, and low and behold the line with the restrictor pill was a different kind of hose (not matching the others) and had no pill in it. I don't know who or when replaced that hose being that it was boosting fine a couple weeks before, but it ended up being a 2 dollar fix. I'm not sure what your boost problem is, but if your just running low boost in all gears, don't be a dummy like me, and check for the pill.