So it just started doing this sometimes any clue what it could be? And also I am getting a sound like an egr valve cycling but have to egr. And no change in exhaust note.
Do you mean it will go up in RPM if you tap the throttle? I get that sometimes, seems like its in regen or something along those lines, right?
Another thing on the cycling noise, if you have the A/C on it will make that noise, just an FYI
the one that always freaks me out is you give it some throttle to back up and it kinda hangs for a bit. Only happened to me about ten times but it freaks me out every time
Check your air intake boots and make sure they are tight and not loose. That will make it idle weird or low, a bad or unhooked DPF sensor will make it idle high like around 1000.
I have the exact same thing happening with my truck. I know this is an old thread. Just hoping to get some info before I take it to the "stealership". What did you find out? Mine is intermittent. I can turn it off start it back up and sometimes I am good for a day or 5min. Idles about 650-680 and when it's screwing up it idles about 750-800rpm.