if it's super stuck and WD40 isn't working, go grab a can of pb blaster and some sprite. figure out a way to let the pedal sit in the sprite for a couple of hours, then let the pb blaster soak for a couple of hours. should do the trick. the soda eats away any buildup or deposits, and the pb blaster is a really strong penetrating lubricant. tie the opposite crank up, and tap the pedal a few times with a hammer. grab your wrench and a cheater pipe if you have one, and take that ***** off.