Hyundai won't start

Those are good THOUGHTS but only thoughts. The car will have a code in the computer. The cost of a reader is about $30 and cheaper than grasping at straws. I even think that the Hyundai can read the code as most other cars can by jumpering a connection. Search the internet for location of jumper. The code will point is a direction. I can't tell you enought to shart with the basics, is there gas to the cylinders? Is there spark at the plugs and it must be a blue spark? Then ensure that the cam and crankshafts are both turning. There are a number of other possibilities but the code will point the direction.