Gas Leak, Gas leak when cold Options

[warrenoliver]

I need some help here. My 73, 2.0, FI engine has developed a gas leak. The leak only occurs when starting when it is cold. It does not leak every time when I start it, only sometimes in the morning - seems like it is more prone to doing it after sitting for a day or two in the unheated garage. The leak is significant enough that gas pools on the left side engine tin near the injectors and also drips onto the ground. It never leaks when it is warm or even later in the day when the temperatures are warmer. This makes me think - CSV.
The leak seems to be coming from under the air cleaner box - near the cold start valve. I have not been able to get it to leak when I have the air cleaner box off so I can't pin point the location - yet.
I have checked the fuel hoses and they seem good and I can't see any places that may be worn from chafing. I am reluctant to remove the CSV because I don't know what I would be looking for anyway. Do these crack or is there a gasket that can go bad?
So, why would it only leak on start up in cold weather (and not all the time)? It looks like there is a direct line from the fuel rail to the CSV so if it were cracked or bad, it would leak all the time.

Thanks.

Warrenoliver