Rain was falling. The cars were parked on pit road with Carl Edwards in 22nd place, and he and crew chief Bob Osborne were arguing heatedly on top of the team's pit box. Not the most likely formula for winning a race.

Edwards and several other race leaders had pitted minutes earlier after rain began falling on lap 127 of the 200-lap NASCAR Sprint Cup Pennsylvania 500 at Pocono Raceway in Long Pond. Nineteen other drivers, taking a gamble on the possibility of a rain-shortened race, had stayed on track.

"The argument came from when it started raining real hard, then we were trying to blame one another for the idea of coming [onto pit road]," Edwards said. "Bob said it was my idea and I really felt like it was his idea..

"I had to walk away. But, personally, I feel like we have a good relationship. We can be perfectly honest with one another and that's really valuable."

Osborne said it was just the way he and Edwards works things out.

"It's not out of the ordinary for us to argue," he said. "We get mad at each other. We walk away and then we walk back together and calmer heads prevail and we have a discussion. ... Ninety-nine percent of the time it works out for us."

It all worked out fine this time, with the race resuming after a 41-minute red flag and Edwards and Osborne winning the gamble -- whoever's idea it was.

Edwards was able to stretch his last tank of fuel to earn his fourth win of the season, second to series points leader Kyle Busch's seven.

"I was really nervous that we made the wrong call there," Edwards said after doing his traditional victory back flip off his car.

The race started in sunshine and it appeared Mark Martin, who took the lead from pole-winner Jimmie Johnson at the start and took control, would be the driver to beat all race. But Martin had problems on two pit stops that put him back into the pack and then dark clouds began moving in, changing some strategies.

Rain began falling on lap 127 of the 200-lap event and, moments later, Edwards and several other leaders ducked onto pit road. Nineteen other drivers, led by June Pocono winner Kasey Kahne and Martin, who led a race-high 55 laps, stayed out to gain track position, waiting to see if the rain might end the race prematurely.

But, despite more threatening clouds and a few raindrops later in the event, the racing continued and Edwards found himself back on top for good when Martin, the last of the drivers on the alternate strategy, had to finally pit on lap 187.

Then Edwards, who made his final stop at the end of lap 166, just had to worry if he had enough gas to get to the end.

Edwards inherited a 5.6-second lead and built it to more than seven seconds as Osborne kept telling his driver on the radio to take it easy and save fuel. He did, beating Tony Stewart by almost four seconds -- half the front straightaway on the 2.5-mile trioval.

Stewart and third-place finisher Jimmie Johnson, coming off a victory a week ago in Indianapolis, were both on the same strategy as Edwards. Kevin Harvick, who crashed with Joe Nemechek on the first lap, came back to finish fourth, just ahead of David Ragan.

• Hungarian Grand Prix: McLaren's Heikki Kovalainen won his first Formula One race after Felipe Massa pulled out of the race with three laps to go in Budapest. Massa overtook Kovalainen and pole-sitter Lewis Hamilton at the start and was heading for victory when Hamilton dropped out of contention with a tire puncture. But Massa's Ferrari engine overheated toward the end and Kovalainen took an 11-second victory over Timo Glock of Toyota.