J JamesP New member Joined Jan 26, 2010 Messages 1 Reaction score 0 Points 0 Jan 26, 2010 #1 driving at 20-40, let off the brake and the truck increases speed gradually. Start up cold it idles fine, but idles too high after warming up. what could it be
driving at 20-40, let off the brake and the truck increases speed gradually. Start up cold it idles fine, but idles too high after warming up. what could it be
P pat New member Joined Dec 28, 2008 Messages 50 Reaction score 0 Points 0 Jan 26, 2010 #2 My first thought would be a vacuum leak somewhere, but you should check the air idle bypass and air idle valve for malfunctioning/sticky operation.
My first thought would be a vacuum leak somewhere, but you should check the air idle bypass and air idle valve for malfunctioning/sticky operation.
T texaswildman New member Joined Feb 9, 2009 Messages 12 Reaction score 0 Points 0 Jan 26, 2010 #3 check for a vacuum leak.
