AVONDALE, Ariz. -- Jeff Burton found the elusive sweet spot Sunday.
The Roush Racing driver passed gambling Mike Wallace for the lead with 33 laps to go and went on to win the Checker Auto Parts 500 at Phoenix International Raceway for the second consecutive year.
''We've been knocked down all year, but we never quit,'' said Burton, 10th in the points after coming into the season considered a title contender. ''We just had to find the sweet spot.
''That's been our problem all year long, finding that sweet spot, the balance, and making the car do what I want it to do. Luckily, we weren't far off at the beginning today.''
Burton said his team kept adjusting the car and making it better throughout the race.
''We're just a microcosm of what America's all about,'' added Burton, who drove a slow backward victory lap around the one-mile oval holding an American flag out the window of his No. 99 Ford.
Wallace, in only his fourth race with the elite Penske Racing South, jumped into the lead on lap 241 of the 312-lap, 500-kilometer race when crew chief Peter Sospenzo elected to put on only right side tires while the rest of the leaders were changing all four.
Burton came out of the leaders' pit stops, under the fifth of seven caution flags in the race, third, trailing Wallace and Ricky Rudd. Burton quickly moved into second place after the green flag waved and began to stalk Wallace.
Two more caution flags helped Wallace stay out front for a while, but Burton's Taurus went into the lead on lap 279 and pulled away, leaving Wallace to hold off Rudd in their battle for second.
The winner crossed the finish line 2.6 seconds -- about 30 car-lengths -- ahead of Wallace on the flat oval. Burton averaged 102.613 mph in the race slowed by 45 laps of caution.
Burton picked up his second win of the season and the 17th of his career.
''Mike was fast but my concern was that he has never won a Cup race and I figured he would do anything to win,'' Burton said, grinning. ''He's auditioning for a job and he did a great job. He ran me hard and clean.''
Wallace, who moved into the No. 12 Ford after Jeremy Mayfield was fired, is signed only through the end of the season.
Wallace, the middle of the three racing brothers from St. Louis, said, ''I haven't been in a position to win a race all year and I did all I could without putting the cars in jeopardy. Jeff just had a better run and a better car, but to finish second is wonderful.''
The best previous finish for Wallace in 102 starts was fifth in the 1994 season-finale in Atlanta.
Rudd's third-place finish, combined with a sixth-place run by Jeff Gordon cut 15 points off the three-time Winston Cup champion's series margin. But Gordon still leads Rudd by a formidable 380 points with four races remaining.
Matt Kenseth, one of Burton's Roush teammates, finished fourth, followed by Tony Stewart.
The majority of the caution flags were brought out by blown right front tires. Goodyear, the exclusive tire supplier for the Winston Cup series, said the problems were caused by a combination of debris on the track, unseasonable temperatures in the high 80s and some teams using less than the recommended 28 pounds of air pressure in the right side tires.
Rusty Wallace, Mike's older brother, was one victim of the tire situation.
The elder Wallace led four times for 91 laps, topped only Burton's five times for 102. Wallace's flat right front tire came when he was trying to hold off Burton for the lead on lap 185.
He did regain the lost lap but wound up a distant 15th.Burton said it was Rusty that he feared before the flat tire.
''My car actually got a little tight there at the end,'' Burton said. ''It would probably been tough to beat the 2 today if that hadn't happened.''
Several cars bounced off the concrete wall during the race.
but the biggest crash came on lap 255, when Jimmy Spencer bumped the sliding car of rookie Kurt Busch. Before it was over, the cars of Mark Martin, Dave Blaney, Ryan Newman and Michael Waltrip were involved.
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