This past weekend a buddy and I were working on my car trying to address what seems like the fairly common problem of a gas smell. After sniffing around for a minute, we found a hose underneath the intercooler that was not properly connected to the engine. So, we removed the intercooler, re-connected the hose, and hooked the intercooler back up. Everything seemed fine until a few days later, I was driving up to the mountain when I noticed a whine coming from the engine. It definitely seemed related to the turbo -- the noise started as the turbo pressure gauge approached 0, and became higher volume and pitch the higher the pressure. While the noise seems to be related to the turbo, it sounds like it's coming from the other side of the engine compartment.
Any ideas of what I should be looking for?
-- '02 wrx wagon