Jan 28, 2009 #1 C Cam Member Joined May 15, 2008 Messages 150 Reaction score 0 Points 16 cause of the unpredictability? There is no belt-squealing noise so it can't be a slipping belt.
Jan 28, 2009 #2 S ScottS Member Joined May 18, 2008 Messages 127 Reaction score 0 Points 16 Have you checked the fluid level.(power steering)