well my daughter took the gn to school and when she came home the gn died and would not start, check the spark, and has fire, it has fuel, and got it started for 1 minute and and then died again, keeped on trying to start it and fouled out the plugs, and smelled like gas, and some gas came out of the exhaust, was wondering if anybody has had this problem before, put some new plugs and still did not turn on. could it be the cranksensor, or any ideas would be great, and put me on the right direction, appreciate any input?????