gas build up when sitting

[Delorean17@xxxx]

Hello List,
When my car sits for over 4 days it becomes extremely hard to 
start.(15-20 secs of cranking) A ton of white smoke comes out of the exhaust 
when it does start and it smells like gas VERY strongly. what could be 
causing unburnt gas to build up in the system when it sits? any ideas?
I did not start it this entire week and now it wont even start at all, 
just sputters and smells like gas. what should I do? usually I start it 
every 3 days so it will start when I need it.

Thanks
David
#2496