PHILADELPHIA – Andre Iguodala snapped a tie game with five straight points in the final 1:30 to help the Philadelphia 76ers storm back from 15 points down in the first half and stun the Boston Celtics 92-83 in Game 4 of the Eastern Conference semifinals Friday night.

The Sixers tied the series at 2-2 and guaranteed a return home for one more game.

Iguodala put the Sixers ahead 85-83, then buried a 3-pointer for a five-point lead.

Game 5 will be Monday night at Boston.

Iguodala scored 16 points, Evan Turner had 16 and Lou Williams 15 for the Sixers.

Kevin Garnett had his first bad outing in an otherwise monster series with nine points. With Garnett in a funk, so were the Celtics.

The Sixers just kept attacking, turning a first half of air balls, botched dunks and sloppy defense into a full-blown display of near-flawless basketball.

Thaddeus Young’s slam made it 63-63 in the middle of the fourth. Jodie Meeks drained a 3-pointer on the Sixers’ next trip down the court for Philadelphia’s first lead.

Williams hounded Paul Pierce to force a turnover, then fed the ball to a streaking Turner for a dunk that put the lead at 68-65.

It was that kind of hustle that brought the Sixers back.

After Garnett blocked a Lavoy Allen shot, Young snagged the ball out of the air and scored to make it 74-74.

Game 4 came down to young legs, fresh enthusiasm and untested big-game experience vs. aging, championship-tested stars fighting for another title.

Iguodala, who has been branded as the face of a mediocre franchise over his eight seasons, has changed that talk with a clutch postseason. He sank the winning free throws in Game 6 to finish off the top-seeded Chicago Bulls in the first round.

And it was Iguodala who finished off the Celtics in Game 4.

Pierce had 24 points, and Rajon Rondo had 15 points and 15 assists. Garnett, who turns 36 today, missed 9 of 12 shots. The Celtics look primed for a blowout victory after the first 10 minutes. They hold out hope a trip back to Boston can make them forget about this collapse.

Down 15 at the half, the Sixers found their spark, their legs and their shooting touch to crank up the pressure on the Celtics.

Williams hit a 3, Iguodala hit a 3, and Williams converted a three-point play to make it 58-54. Williams stood on the free-throw line and calmly sank the deficit-slicing free throw.

Meeks, a starter-turned-sub, stole an errant pass and went all the way for his first bucket of the game to make it 63-59 at the end of the quarter.

Philadelphia’s 10 baskets in the third were one more than their total for the entire half ,and their 28 points were three shy off their halftime total.

The Sixers had vowed they would be a more determined team after the veteran Celtics dismantled and demoralized them on their home court in Game 3.

The Sixers said after their 16-point loss in Game 3 that they would return more focused in preventing another hot Celtics start that took them out of the game.

The Celtics squashed that attitude.

Pierce and Avery Bradley hit 3-pointers, Garnett hit a pull-up 20-footer and the Celtics raced to a 14-0 lead only 3½ minutes into the game.

The Sixers truly couldn’t find their footing. Young bounced the ball off his sneaker on a drive down the lane, and Pierce converted on the other end for an 18-3 lead.

The Celtics could never find that extra scoring boost to truly put away the Sixers. Rondo, Garnett and Ray Allen all had quiet first 24 minutes and the Celtics let the lead drop to seven.

Rondo scored an uncontested bucket coming out of a timeout to end the half and put the Celtics up 46-31.

NOTES: The 76ers head to Boston 2-8 over their last 10 road postseason games. The Sixers haven’t won a playoff series when they trailed 2-1 since 2001.