Riddle me this: I didn't have these gizzmos on my first 930 and now that I have the top of the engine exposed, thought I would check everything out.
The valve on the right has the top hose going to the back side of the dizzy vacuum can, and the bottom hose to the throttle body. I 'think' it's supposed to block ignition retard at startup to advance timing and set a high idle....until something(?) tells it to do otherwise once warmed up or timed out. I pulled the hose off the dizzy and can blow through it and hear the air going into the TB, so the valve is open stone cold.
The other valve on the left has nothing connected to it but a short piece of vacuum line going nowhere and no electrical connection.. May have something to do with air injection control to the exhaust manifold but just guessing as both of the injection manifolds have their own dedicated vacuum operated valves linked to the TB. Somewhere I'm sure I have a diagram of all the vacuum lines etc but thought I would reach out here first.
Almost got her all buttoned up following the fun and games of adjusting the valves.
