Iowa coach Kirk Ferentz says the offense needs a spark and he will insertsenior Randy Reiners as the starting quarterback against Northern Illinois.Ferentz says they are looking for a spark and perhaps Reiners’ style canprovide that.Northern Illinois is also 0-2 but Ferentz says it is an improving ballclub.Members of the offensive line have been shouldering much of the blame forthe lack of offense the first two weeks but Ferentz says the problems rundeeper than the front-line.