The Wall Street Journal crossword can be very challenging. But we are here to help! Today we will help you find the answer to the clue Internal combustion process, and an explanation of the other long Across answers. After hunting for any other hints and relevant information in the Wall Street Journal crossword puzzle we've found the answer to the clue Internal combustion process, and an explanation of the other long Across answers. The answer to the clue Internal combustion process, and an explanation of the other long Across answers is: