PHOENIX, Nov. 30 (Ticker) -- While the Phoenix Suns again flashed their newfound defense, they reminded the Indiana Pacers that they can still score in bunches, too.

Steve Nash set a career high with seven 3-pointers and scored a season-high 31 points as the Suns used a pair of first-quarter bursts to ambush the Pacers, 109-91, for their fourth straight win.

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Shawn Marion collected 21 points and 12 rebounds for the Suns, who have replaced some of their running and gunning with some scratching and clawing. Over their last six games, they are allowing an average of 88.8 points - nearly 15 points per game lower than their league-worst norm of last season.

"Our defense was the key," Suns coach Mike D'Antoni said. "If we keep up on defense, it makes it a lot easier on offense when you know you don't have to live by the shot."

However, the Suns wasted no time showing the Pacers that they can still get up and down the floor a bit. They began the game with a 14-4 burst and added an 11-0 run later in the first period for a 33-14 lead.

At the controls was Nash, the 2005 NBA MVP who is scoring a bit more this season. He made his first six 3-pointers and finished 7-of-8 from the arc, surpassing his previous career high of six with Dallas against Orlando on April 5, 2003.

"When you shoot the ball well, you feel good," Nash said. "I've been pretty cold from threes this year, so it was about time. I still try to make the right play, but if I am open and I can give myself a look, then I take it. If my teammates are open, I will try to find them."

"I guess his shot is back," D'Antoni said.

Overall, Nash made 10-of-15 shots and added nine assists and eight rebounds. He directed an offense that embarrassed the Pacers, one of the league's tougher defensive units.

"We caught them on a back-to-back; you never know how much they were off their game and how much we were on," D'Antoni said. "We are starting to play better. You can see that."

"We're not making excuses. We got beat tonight," Pacers forward Jermaine O'Neal said. "Everybody plays back-to-back games and you have to find a way to win. They are a real rhythm team, and once they get going, they are hard to stop."

Nash had a 3-pointer and another hoop in the game-opening spurt and Marion scored five points in the 11-0 burst as Phoenix built a permanent double-digit lead.

"We are capable of scoring some points. Tonight was one of those games where we were knocking down our shots like we are suppose to," Marion said. The offense is clicking, so it is a big plus when the defense is clicking on all cylinders."

The Suns held a 61-44 halftime advantage, shooting 51 percent (24-of-47), including 7-of-14 from the arc. Nash was 5-of-5 from long range.

Nash scored 11 points in the third quarter, when Phoenix built the lead to 30 points before settling for a 91-64 bulge entering the final period, when Indiana coach Rick Carlisle was ejected.

Boris Diaw had 17 points and eight rebounds and Kurt Thomas added 11 and nine off the bench for the Suns.

O'Neal had 25 points and nine boards for the Pacers, who have lost six of their last seven visits here. Indiana fell to 2-1 on its five-game road trip.

"We didn't play well enough early to give ourselves a chance," Carlisle said. "Our undoing was the first quarter when we were outscored by 18. Our energy level wasn't where we needed it to be. It was unfortunate because we had two very good performances, especially at the defensive end, coming in. We can do better and that is where the regret is."