Begun vehicle everything typical, retreated from carport, drove not too far off fine and afterward BAM! tremendous single explosion out of the fumes, motor went dead, let it coast to a stop. I did a visual examination in the engine and saw nothing unusual. Endeavored to restart the engine, the motor started like ordinary, was getting a lot of fuel however wouldn't fire. Has anybody had this occur or understand what it very well may be? Any ideas would be greatly valued. T