Midfielder Faurlin suffered a dead leg during Saturday's goalless draw at Hull, while striker Helguson is still struggling with the groin strain he picked up against Coventry last Sunday.
Norway international Petter Vaagen Moen is on standby to replace Faurlin, while West Brom loanee Ishmael Miller is likely to continue up front if Helguson misses out again.
Hungarian midfielder Akos Buzsaky is still out following knee surgery but he is back in training and could return in a couple of weeks.
Defender Peter Ramage (cruciate) and strikers Jamie Mackie and Patrick Agyemang (both broken leg) remain long-term absentees for the table toppers.
Source: PA
Source: PA