LARAMIE, Wyo. (AP) -- Brian Van Emmerik knew an outstanding defensive effort was needed if Wyoming was to beat BYU (No. 12 ESPN/USA Today, No. 15 AP) and Kevin Feterik, the nation's seventh-ranked passer.

	Wyoming quarterback Jay Stoner scrambles out of the pocket as tackle Adam Goldberg battles BYU's Chris Hoke.

"I've been waiting for this game a long time," said Van Emmerik, who had two of the Cowboys' four sacks. "I felt awesome.

"We knew what was coming," Van Emmerik said. "We knew we were going to get it. We knew we could stop it."

The loss snapped the Cougars' six-game winning streak and prevented BYU (8-2, 5-1) from clinching the Mountain West Conference title outright while keeping Wyoming's championship hopes alive. BYU can clinch the crown, and a berth in the Liberty Bowl, with a win over Utah nest week.

Wyoming coach Dana Dimel said holding BYU to 29 yards rushing -- 89 below their average -- was the key.

"The defensive line was playing so tenacious that we completely took their run game out of their package and made them throw the ball and that was our game plan," Dimel said.

To counter the pass, Wyoming blitzed heavily and used five defensive backs.

Jay Stoner sparked Wyoming's offense, going 20-of-30 for 302 yards and three touchdowns, including a 22-yarder to Kofi Shuck late in the third quarter that put the Cowboys up 24-10.

Wyoming piled up 475 yards against the nation's 12th-ranked defense. BYU had been giving up only 288 yards per game.

"The (offensive) line played great," Stoner said. "They gave me enough time to throw the ball."

"It just simply wasn't one of our better nights," BYU coach LaVell Edwards said. "They just came out and took the fight to us and sustained it throughout the whole ballgame."

"We just screwed up, a lot," BYU linebacker Rob Morris said. "We'll bounce back and get ready to play Utah and get ready to beat Utah and win a championship. We don't have any options now."

It was Wyoming's first win over BYU since 1988. The teams had met only once during the last six regular seasons because of a scheduling quirk in the Western Athletic Conference, a league which both teams left after last season.

Tim Beasley, who led all rushers with 82 yards on 16 carries, added a 14-yard scoring run for Wyoming with 9:12 remaining to boost the lead to 31-10. He set the tone by taking a screen pass 44 yards on the Cowboys' first play.

Feterik was 30-of-46 for 362 yards and moved ahead of Steve Sarkisian, Marc Wilson and Steve Young and into fifth place on BYU's career passing list with 7,756 yards.

Owen Pochman's school-record 14th consecutive field goal, a 32-yarder in the third quarter, drew the Cougars within 17-10.

Stoner then led the Cowboys 80 yards, a march that included a 22-yard diving sideline catch by Tommy Nash and Shuck's streaking reception in the corner of the end zone.

The extra point after a 1-yard TD run by Feterik with 4:47 remaining moved Pochman into second place on BYU's career scoring list with 241 points.

Stoner passed for 204 yards in the first half and found Wendell Montgomery for scoring strikes of 14 and 20 yards to stake the Cowboys to a 14-7 halftime lead.

Less than three minutes into the game, Stoner's 14-yard TD pass to Montgomery put the Cowboys up 7-0.

A 20-yard TD pass from Feterik to Margin Hooks with 1:53 left in the second quarter tied it, but Montgomery's second TD with 10 seconds left in the half capped an 80-yard, 10-play drive that gave Wyoming the lead for good.

Stoner moved past Scott Runyan into fourth place on Wyoming's career total offense chart with 5,642 yards. Montgomery, who had seven receptions for 122 yards, extended his school record to 39 straight games with at least one reception.

BYU has not been shut out in 310 consecutive games. Its last shutout was Sept. 27, 1975, a 20-0 loss at Arizona State.