When you are on full lock the power steering pump builds up enough pressure to open a relief valve excess pressure won't blow any seals, with the pressure drop the power steering valve closes and the the signal is lost to keep the idle up, if you feel that the steering is heavy, the belt may need adjusting or you have a tight ball joint or top strut plate, you may need to have these checked out as well.
Mark (mhpautos)
Tuesday, November 24th, 2009 AT 11:37 PM