It runs from the fuel pressure regulator back over to the air silencer. For some reason it was removed from mine when I bought it. It will cause your 4Runner to run to rich if it's not connected. Mine was missing for almost two years before I found it. After I fixed it my 4Runner runs a lot...
I bought my current one in summer of 2015. It's a 2002 limited 4wd it had 199k on it one owner in excellent condition. I got it from a Toyota dealer for $4500.
I'm getting ready to replace my timing belt and I'm looking for advice. I have 217k and no history of when if or if it's ever been replaced. Any kit better than others? I'm looking at dayco, gates and aisin. Any help is greatly appreciated.