[T86951]

all winter I was having a problem of rich on cold starts on my '86 NA 944 and suspected the idle control valve and was about to replace it. that would have been a lot of work and about $120 wasted.
What I have found with a lot of sudying and testing is this:
The idle control valve on my car has 3 posts. On a cold start voltage is supplied to the center and top posts which opens the valve to let extra air in. As the car warms up power is shifted from the top post to the center and bottom posts which closes the valve.
Mine is always suppling power to the bottom 2 posts, cold or hot so the valve stays closed hence no extra air on a cold start hence an overrich (actually under supply of air) condition. I can unplug the connector and run 2 wires from my battery and touch them to the top 2 posts and the valve opens and it starts perfect when cold. I can then slide the connector back on after about 30 sec of warming up and it closes it and idles fine.
Now I have to figure out why my computer is not swiching power to the top 2 posts when cold. I have already replced the temp sensor with a new one.
I assume there is a relay somewhere that swiches this but I have no idea where so I am now at a dead end. Anyone have any ideas on this? Help!!!