[WyattEarp]

So I think I may have found my problem. Still need to get a larger sample size (more cold starts) to be sure.

Weak battery may be the issue. Apparently the car is very picky about having a very strong battery at cold start (is this a CDI thing??). The car sounds like it is cranking just as fast but fails to start. Looking back now the fail to starts have been after the car was sitting for a week or more.

I have two cold mornings in a row now with reasonably quick cold starts (say two 5 second cranks). First morning I had the car on a charger overnight after having done pressure tests. Day two was after driving the car the day before so nice full charged battery. Car actually seems and smells a bit rich when cold but given the cold pressures I am getting that is probably correct. As sooon as the car warms up a little it runs perfectly.

So this may have been a CIS thread in error. Good news is I have learned a bunch about my car and CIS thank to everyone that took the time to respond to this thread.