SHR tries to determine cause of fuel-injection malfunction

Tony Stewart, regarded as a master of fuel conservation, was attempting to save gas Sunday when a caution came out on lap 247 of 312. Running 13th and hoping to make it to the finish without another pit stop, Stewart went to one of his old gas-saving tricks — shutting off his engine. The problem: It wouldn't come back on.

"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)