"Turned it back on, and it never re-fired," Stewart said. "I honestly don't know why. It's not really my department."
Immediately after the race, Addington huddled with engine specialists at Hendrick Motorsports, which provides engines for Stewart-Haas Racing.
"We'll keep working with them to try to figure out what happened," Addington said. "We've got to dig into it and find out what happened, when it happened and what caused it." (via USAToday.com)