You don't put it in a vavuum line. When you buy the spray, it comes with a long
plastic tube, with a bend in it, with a hard plastic piece at the bend. The tube goes
inside the throttle body under the intake hose tp that bend. That plastic piece on
the bend is so the tube don't crush. The spray will be directly at the TB unit.
Someone holds the pedal at 2200 RPM, then you spray it in...
If you didn't find a video, you sure did not look, because they're on You Tube,
and specifically for that product with the "U" shaped tube. I kept mine, so I can
buy it as a spray without it, for less...