Hirvonen lost time on Saturday morning's Surkee opener when he hit a rock, and although Loeb then suspected he picked up a puncture on the following Leustu stage, the world champion's advantage still increased over the whole loop.
The Fords' third-place contest is no longer as close after Petter Solberg dropped 15.1s to team-mate Jari-Matti Latvala over the first two stages. The Norwegian felt his car's ride height was too low.
Further back, Sebastien Ogier's S2000 Skoda is now in the overall top 10 following a crash for Ken Block.
- Petter Solberg