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Thanks for the link; I will double check, but I'm sure there aren't any leaks.
If I could figure out where the grey cold-start wire terminates, I would know better what is going on. I'm sure this is the problem. Just wish I could find the right wiring diagram or schematic. None of the wire colors in the car match any diagram I've seen, and seems to be a mix of this diagram/that diagram. The '87 must be pretty specific.
Tried this - http://www.autoelectric.ru/auto/volvo/740/1989/740-89.htm
and the Haynes diagram
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