Originally Posted by Truckin
I have an 2011 Ram that idle will drop to 500rpm then bounce up to 700 or so and I think I can feel a surge when I drive sometimes to. Is this something that I can take to the dealer to have replaced ie. faulty part and if not what sensor did you replace and where did you get it?
Truckin, it sounds like you are having the exact same issue I am having. I have a 2011 Ram 1500 with the 5.7L. About 50% of the time when I am driving and come to a stop, the idle will drop down to 500 rpm. The other half of the time, it will idle at the "normal" rpm (about 700 rpm). I can't seem to find any kind of a pattern why sometimes when I come to a stop it will idle at 500 and other times 700. But, I have noticed that the only times it drops down to 500 rpm is when I am driving and come to a stop. When it is idling at 500 rpm, if I shift into any other gear (ie. neutral, rev, park) it will immediately go back up to 700 rpm and stay there. The same thing happens if touch the gas paddle at all, it will idle back up to 700.
As a side note, when it is idling at 500 rpm, it is not running rough or anything. It is still running just as smooth as when it idles at 700 rpm. The only difference I notice is at 500 rpm there is a noticeable engine power drop. For example, when I am sitting still and I let off the brake, the truck will not move forward as quickly as when its idling at 700 rpm, and depending on the grade of the road it may not even roll forward at all.
Does this sound like the issue that you are having? Have you heard anything back from the dealer about it yet? Any help would be much appreciated. Thanks.