Thanks for all the input guys, however....
I've checked the 4 pin dual temp sensor and it checks out as per the temp vs res table.
I am getting power to the N8 module and about 4 volts (with a 70% duty cycle) to the IC valve so I don't think my problem is related to shorts or grounds.
While I do expect there is a vacuum leak somewhere, I have been all over the engine with carb spray and can't find a problem.
System is quite a bit differant than the 380.