On a 1989 honda prelude 2.0Si, under the fuel pressure regulator there is a place for a hose to be slid on, Here's the question: where does that hose go to? Please Help! ThX,
Nathan

That is a fuel return hose. Here's how the fuel pressure regulator works:

The fuel pressure regulator maintains a constant fuel pressure to the fuel injectors. When the difference between the fuel pressure and manifold pressure exceeds 43 psi, the diaphragm is pushed upward, and the excess fuel is fed back into the fuel tank through the return line.