1996 Acura CL 96 Acura cuts off while driving?

1996 Acura CL 155000 miles

I have a 96 Acura 3.0 CL that cuts off while I am driving it. Some days it will do it 4 times in a mile and sometimes it runs fine for weeks. It usually only does it for the first couple of miles I drive and it is worse in the summer when it is hot. Also when its hot outside sometimes I have to crank it 10 times for it to start. When it does cut off the green key light in the upper right comes on. I took it in and of course it wouldn't do it for the mechanic. He cleaned out the throttle body housing but that didn't do it. Any suggestions?