when i started my car today it war shaking , so i put it in drive and i started shaking a little more so i put it in park to open up the hood th see if it was any visual damage (Just to look good for the neighbors) and i got an egg smell so i look in the rear and i see some smoke coming from the tail pipe. When i took it to auto zone for the free cel service he said cylinder 1 and 2 where mis firing anyone got any input