[Joe Wicked]

I had a similar problem with an old Trans AM I had years ago. Turned out to be a clogged fuel filter, but even after changing it, it helped but didn't go away completely. Turns out that the pump was having to work a lot harder to get past the clogged filter and it was beginning to fail. It would only happen when it was over 80° outside. If the other ideas don't work, it at least gives you something else to check.