[quote=big bill I.I.#4698]Do you have a inline fuel filter if so try changing it. About three years ago I had a problem like you describe when the weather was hot.

Yes, I run a cleanable, glass tube filter before the pump. I also tried 2 new pumps with filters that screw into the inlet, but nothing helped so I went back to my original little Purolator pump and glass filter which is working just fine now and I can see thru the filter.
For next summer, I've been thinking about trying a 'cool can' or maybe re-routing the fuel line somewhere thru cooler air? I guess I need to start with an underhood thermometer of some kind to make sure I'm not 'barking up the wrong tree'.