Idle's funny but only when warm. Desired idle for these trucks are around 850rpm. But for some reason whenever you come to a stop sign after the motor is warm, the idle drops down to less than 500 (almost stalling) and stays there for a few seconds and then goes back to normal. My truck has done this for years and I've never figured out the problem although it is annoying. I've searched everywhere for a solution with no luck. Other than the idle problem, the truck runs great.