FORT COLLINS, Colo. (AP) _ Senior running back Heikote Fakava ran for 132 yards and a touchdown and Hawaii's defense stiffened four times in the fourth quarter Saturday as the Rainbow Warriors beat Colorado State 31-23 in a Western Athletic Conference football game.

Fakava, a 210-pounder, scored his touchdown in the second quarter on a 5- yard slam up the middle to give Hawaii a 28-10 lead, which proved to be insurmountable.

The victory was the second of the season for the Rainbows and their first WAC triumph. Colorado State fell to 0-2, both losses in WAC play.

Hawaii led 31-20 just moments into the fourth quarter when Mike Brown of the Rams kicked a 20-yard field goal. The Rainbows had held CSU on three consecutive plays inside the 3-yard line to force CSU's field goal.

Moments later the Rams had driven inside the 10 again, but Mike Tresler intercepted quarterback Scooter Molander in the end zone to halt that drive. The next time CSU got its hands on the ball Molander led the Rams to the 35, where a 52-yard field goal attempt by Brown was blocked by Tresler.

CSU had one final chance to tie late in the game when the Rams drove to the 1-foot line. But on a fourth-and-goal situation, the Hawaii line threw Scott Whitehouse for a 1-yard loss and took over on downs at the 2.

Fakava, the leading rusher in the game, then carried the ball five of the next six times as the Rainbows ran out the clock.