Replaced the lock cylinder with a new one. NO problems getting it in. It turned from the ON to start and to ACC just fine. However, I had to give it some (but not much) to get it to go into Off. Now I CANNOT get it to turn to ACC or ON or Start. The key comes right out. I tired removing the solionod plunger and trying it in neutral. No amount of pressure, fiddling, or cussing at it will get it to turn. I think I may have a defective lock cylinder and the tumbler mechanism which locks the cylinder may be binding up...A LOT. Any suggestions as to what to do. Unless I can get it to turn to start I cannot remove the lock cylinder. Help!!!