Cold morning.... Crank but no start.

[jdlmodelt]

Mine has done that too. If you don't let it run for a few minutes and shut it down too soon it will do it. If it has been setting for a week or two it has done it. I find that I have to push the gas pedal all the way down and hold it there while I crank until it starts. They flood and stall and then don't want to start.

[Retroman1969]

Originally Posted by jdlmodelt

Mine has done that too. If you don't let it run for a few minutes and shut it down too soon it will do it. If it has been setting for a week or two it has done it. I find that I have to push the gas pedal all the way down and hold it there while I crank until it starts. They flood and stall and then don't want to start.

Yes, it was holding the pedal down that eventually got it started. I'm guessing the big puff of smoke is further evidence it was flooding (it's not the AOS, I had it checked recently).
I've never driven my other Boxster in sub freezing temps, so I don't know if these engines are prone to flooding in such weather (beyond being programmed to give a richer mixture for cold starts) or if it's the failure of a part.
Thanks for the extra input.