All you have to do to adjust it 1. idle= loosing the spring until the car wants to stall, once you have it there you keep turning it quarter turn at a time till the car idles correctly. 2. release pressure = is set based on how much vac you want it to hold, hopefully you have a dash hawk to tell you, you want it to release between 15-20 hc that way you know it's adjusted correctly, also if it backfires between shifts then you'll have to tighten the tension on the spring by again quarter turns at a time. Just don't go crazy with the knob, otherwise its gonna be hard to get the adjustments right.
