Yaris/Scion & Vitz :: 2003 Toyota Echo Starts And Runs Good But Stops When Warm Up

I have a 2003 Toyota Echo with 250,000 miles. It has been a great car as I commute 90 miles to work. I have had no major problems with the car. Unfortunatly it recently died on the way to work. It was running great and then all the sudden it sputtered and killed. When I first tried to start the car it would just turnover but after waiting 10 minutes it started back up (this was a cold morning). When it started it was running great again. I drove it another 15 minutes and it all the sudden died again. This happened 3 times.

I have hooked up to a scan tool and a camshaft position sensor code displayed. I replaced that but had no change. Another code came up as mass air flow sensor. I purchased a used one of those and still no change.

I have started the car up numerous times and always have the same results. It starts right up, idles good, speeds up good and runs good at full throttle. The problem becomes when it warms up the car kills. If I run it at idle to a slow acceleration it takes longer to kill than if I run the car at full throttle. Once it kills it will not start up until the car cools down, but once it cools down it will start right back up.