There are a few things you can do to increase the chances of your car shooting flames with a spark plug. The first is to make sure that your spark plug is properly seated in your engine. If it isn’t, you can try moving it around a bit to see if that helps. The second thing you can do is to use a heat gun to heat up the metal around the spark plug. This will help it seat better and make the engine run more smoothly. Finally, you can try using a vacuum cleaner and bucket to suck up any air pockets that may be present in your engine. This will help keep the plugs from getting too hot and causing them to fire prematurely.