Reallyfrustrated

I want to thank all you guys for the great suggestions. As it turns out, this time the car DID stall while at my mechanics, and we were able to determine that the problem was in fact the fuel pump. However I will be taking advantage of all the great maintainence tips you gentlemen provided. Thanks!

Yes, I had the fuel filter changed recently. That couldn't be affected by temperature, could it?

Hi. Thanks for info. The things you described, are these things that would only fail during hot weather? The temperature is DEFINITELY an issue....

Hello everyone. I have a 1991 ES250 with 95K miles. It is in great shape and has been properly maintained it's entire life. The past 2 years I have had a problem with the car stalling, and refusing to restart. This ONLY happens occasionally, and ONLY during very hot weather (95+ degrees) when the AC is on , usually during stop and go traffic. The car will begin to backfire, and then lose power and die. When you try to restart it, it will immediately sputter and die again. After the car sits a while (usually 10-45 minutes) it will start again and drive perfectly. The temperature guage always shows the car is operating at the correct temperature, and is not overheating. I have taken it to my mechanic twice, but of course it will not stall in his presence, so he cannot diagnose it. Please help me! I otherwise love the car, and would hate to have to get rid of it. Thanks!!