Originally Posted by Wharbone

Sounds like it's your main relay. I had a similar problem, replaced my relay, and have not had the same problem since.

Check out these links. They show you how to fix it if you have soldering skills.
http://www.markl.f9.co.uk/howto/elec...main-relay.htm
http://techauto.tripod.com/mainrelay.htm

What happens is the solder joints dry out and separate. The with the heat of a summer day, the joints then expand and contract causing intermittent starting problems.

The main relay is not a pain to get to, and is easy to take out and put back in.