Stall problem 1997 Subaru legacy

Have a 1997 Subaru Legacy 2.2 liter. Having stalling issues after 20-25 minutes of driving. Will restart but gets shorter and ashorter intervals between stalls and then stalls right after start every time until in has sat a while and cools down. Changer ECU. Need other options. Thanks!

I would think your check engine light would be on. It sounds fuel related, like a clogged vent in the gas tank.

Please post any codes.

No codes registered. The ATF light comes on sometimes but not consistently

It seems as heat is the determining factor. I would bet the coil pack. You can determine what the flashing ATF code is here. http://www.ultimatesubaru.org/forum/showpost.php?p=967949&postcount=1