Through 100 laps of the Ford Eco-Boost 400, Kyle Busch still held the top spot as he had for much of the race to that point. Busch had led all but 15 circuits around the Homestead-Miami Speedway, but engine problems seemed to be creeping up with his No. 18 Toyota Camry. Busch reported to crew chief Dave Rogers that the engine had quit running, then started running again, several times in succession.
A similar issue plagued teammate Denny Hamlin at Martinsville Speedway last month, ultimately derailing a likely win for Hamlin and His No. 11 team when the master switch - installed improperly - shorted out.
Martin Truex Jr. held down the second-position at the century mark, while Matt Kenseth ran third in his last race for Jack Roush. Best friends Clint Bowyer and Jeff Gordon, fresh off their brouhaha last Sunday in Phoenix, rounded out the top-five. Gordon of course intentionally crashed Bowyer last Sunday as retaliation for several incidents earlier in the year. Their pit crews subsequently erupted in a fight, and Gordon wound up fined $100,000 and docked 25 championship points.
As far as the championship fight is concerned, Jimmie Johnson runs sixth, while Brad Keselowski sits eighth.