So I've got my 2002 WRX grocery getter, and I'm ready to do a few things, including seafoam the beast. I'm prepared to run some through the cylinders and the gas tank only. I'm not too fond of putting solvents in my oil lines, especially since I'm paranoid that loosening gunk might cause a leak somewhere.
140,000mi on it, just changed the belts, and I'm preparing to change the O2 sensor. I figure it's better to run some seafoam before I put a brand new sensor in, just to avoid any foul-ups.
Anyhoo, I've searched around for seafoam posts, and it's the same thing over and over. "i love it", "it works" etc.
My real question is, which vacuum line should I use, and can you post a pic highlighting which hose? I've heard the hose for the compressor bypass valve is a good one, but I'm not sure which one it actually is.