Le Toux scored on a penalty kick in the 80th minute to pull the Union (8-7-1) within a goal, then tied it in the first minute of stoppage time. Roger Torres also scored for the Union.
Philadelphia has a seven-match winless streak (0-3-4) and hasn't won since July 17 in a 3-0 victory at New England.
Rajko Lekic, A.J. Soares, Moncef Zerka and Benny Feilhaber scored for the Revolution (4-11-12). They have a seven-game winless streak (0-2-5).
Philadelphia was without Faryd Mondragon, the All-Star goalkeeper who fractured his right ring finger in last Saturday in a 2-1 loss at Real Salt Lake. Rookie Zac MacMath made his first career start for the Union.
This game was originally scheduled Aug. 28, but was moved because of Hurricane Irene.
(Copyright 2011 Philadelphia Union. Reprinted by permission)