Originally Posted by rbc

That idea with the vacuum hose running to the cabin from the valve -- to turn off the engine by sucking -- did occur to me, right up until I remembered this is my wife's daily driver (when she gives me my car back). That could be weird in any number of ways.

Ok, so the place to start is tracking back to the cylinder? It does have engine oil in it from the faulty shut off valve (drips visible). I did check the brown line to make sure it was attached -- and it's a biatch getting my hands in there -- and it is attached. Should the brown line have vac when car is at idle or just when key turns to off position?

I hate vac issues. Hate them.