Just got a new fuel tank installed at the local toyota dealership courtesy of the recall on the fuel tanks. Picked up the cruiser filled it up and headed up into the mountains with the kids. On the way back home I was cruising about 65 on the freeway and it just started sputtering, total loss of power and once I pushed the clutch in it died. Once we stopped rolling I turned the key and it start up just fine. Got back on the freeway and it started doing it again once I got up to about 45. It continued to do this until finally if just wouldn't start anymore. I had a full tank of gas and only put 90 miles on before this happened. Got it towed back to the dealership thinking it is something that they caused since it has been running fine before the new tank was installed. They have been scratching there heads about it for the past 2 days of course they have only started it and driven it around the dealership. Any ideas on what this could be causing this.