Hey guys I have a 2000 ram 1500 with the 5.9 l. I need help figuring out why my truck idles at about 590-615 rpm, when it should be 700-800. I have tried iac and tps. Neither have fixed it. It's only at idle but I do notice when driving when I hit the accelerator it sounds like a vacuum leak, but can't seem to find one. The dealer scanned the.computer yesterday and said there was a o2 sensor stuck for about 15 seconds. But I don't know if that couldbe th

 

When I say vacuum I mean it sounds.like a bunch of air escaping from somewhere

 

Why do you think it should idle so high?? Mime idles between 570 and 610

 

Mine idles below 700 when fully warm.....

 

Yea according to my bulldog it will jump around when warm but wont get close to 700 except when cold. Usually stays about 610 or so

 

mine stays at 600 as well.. I didnt think it was strange at all.

 

If you hear a vacuum leak when accelerating, check your plenum....

 

It idles rough