By Meredith Perri/DFP StaffCHESTNUT HILL — And then there was a spark. It didn’t yield a win, and the Boston University men’s hockey team is now winless in its last seven games, but Friday’s 6-4 loss to No. 3/4 Boston College showed a level of play the Terriers have not displayed thus far in 2014.MinusesPaltry penalty killGoing into last Saturday’s tilt with the University of Maine at Frozen Fenway, the Terriers had an 85 percent success rate on its penalty kill. Since then, though, something has gone awry as BU has given up five power-play goals in eight chances in the past two games. Senior captain Garrett Noonan was the only Terrier to take a seat in the penalty box Friday evening – first for interference in the opening frame, then for holding in the second. Each time, Boston College, who has the eighth ranked power-play unit in the conference, monopolized on its advantage. Before Friday’s game, BU coach David Quinn implied that the Terriers might be doing too much on the penalty kill. After the game, he added that not having sophomore defenseman Matt Grzelcyk and junior wing Evan Rodrigues also has an impact. “It has killed us the last two games and it has been pretty good over the course of the season,” Quinn said of his team’s penalty kill. “Probably some of that has to do with some of the guys we have out. They’re key penalty killers. We have got to clean that up a little bit.”DefenseJust like the penalty kill is suffering from the team’s injuries, so is the Terriers’ overall defense. Don’t let sophomore Sean Maguire’s increasing goals-against average confuse you, the netminder had one of the better games in goal than either he or classmate Matt O’Connor has had in the second half of the season. Maguire bailed out the Terriers’ defense multiple times during the game, including a spree during the second where he stopped three consecutive shots, including a breakaway chance, before a BU turnover led to a goal by BC wing Quinn Smith.