[924RACR]

Quite right - don't forget that it must be physically removed from the engine (which I overlooked first time I read this!), as it is warmed up either by the electrical connection or through the physical contact. By isolating it from both, you will keep it in the "cold" state longer.

Though eventually the car will warm up and the mixture may get too rich for the warm engine.

Also, realize that idle and mixture settings are to be set with the engine warmed up; another test will be to warm the car up, adjust mixture and idle there, then see if it'll still start when cold, and also how easily it restarts after shutdown while still warm.

Keep in mind also that when cold, the cold start valve is needed to get it to start easily. If wiring to these is bad, etc, it'll be hard to start cold.

Finally one more thing to not forget... if the car has only gas in it from when it was warm out... you may have a problem with water in your gas! It wouldn't hurt to put some gas-line antifreeze in it, if this is even remotely possible. Even better than generic gas line antifreeze would be Chevron Techron FI cleaner, which will capture any loose water but also help clean your fuel injection.