ok stop all the applause mmmm after a fun day of driving the old blue volvo all over town, I went out just now and ugh no start. It will turn over sounds aok but won't stay running. I have a new ect, new o2 sensor, new cat, IAC is original though have a spare will try that tomorrow its dark now, also have new plugs, cap and rotor are 6 months old and it ran beautifully early a little hesitation but no other issues. New fuel fitler (90 days old)
It got colder was 4 degrees earlier and now about freezing so tell me the diagnosis:
knock sensor, bad IAC, bad map ( me thinks it is the map sensor
Oh I checked all the grounds again it ran really sweet when I put in the new o2 at about noon - not getting any codes other my speedometer which I knew about.

Very frustrating mmmm thoughts anyone :(