A loss of power on the freeway may due to an internally leaking fuel pulsation dampener. This commonly occurs on higher mileage vehicles.Google+
Car Problem Reports
Toyota Pickup Loss of Power on Highway Due to Internally Leaking Fuel Pulsation Dampener
Toyota Pickup Problem
Engine Affected: 2.4L 4 Cylinder
Visitor, 1994 Toyota Pickup, 2.4L 4 Cylinder, 231,000 mi
idle a little after warm up. then cutting out throttling up up when shifting gears.