BINGO
This wee unit reads the vacuum & boost pressure then sends it back to the Apexi ecu and displays the reading on the commander.
I think it is the 2 bar map sensor.
Problem is that my apexi is displaying - - - - on the boost and the car will not idle when it see's this, then it stalls. It is tempromantal and at the moment is doing my head in. This is what stopped the car from running before the skye run, then it worked again and i thought it was a loose vacuum hose causing it.
I need to borrow one to see if it is this small piece of wizzardry that is stalling my car, or better still, if anyone has one to sell????
Well done jonboy, you have 10 points
5 points for grant for all the narrowing in on the answer hehe