Only my 3rd day with the truck and ive noticed it has a very rough idle while sitting still. It seems to be worse on cold starts. ANyone else have this issue? Its the Hemi engine.

 

i did notice that sometime my truck when in D and stopped at a light tends to be a little rough, but if i glance at the rpms i also notice that its at 500, but when i'm in N its at 600 and the rough idle is gone....this is only sometimes it doesn't always go down to 500 rpms when in D, i just figure i've been standing still too long and the big engine doesn't like that

 

yeah mine does this too, i've asked the dealer to set the idle a little higher, they said they did but it still idles at 500. if you turn on your A/C it will boost it up to 600 rpms and the rough ness will be mostly gone, also if i have my windows open i just hold the break and lightly tap the gas and it will stay at 600.

 

you could always try cleaning out the throttle body, that might help

 

mine does it too....my 4.7 i had did it also.....i've went through and cleaned throttle bodies, done injector cleanings, everything i can think of to get up back around 700 where it normally idles but nothing i've tried will get it there.....i've just kinda accepted it and figure that at 500 rpm is burns less fuel then at 700 so i kinda like it lol

 

Trying cleaning the IAC sensor. My truck use to idle rough when cold and I cleaned up the sensor with throttle body cleaner and its been fine ever since.

 

My truck is new with 400 miles. I shouldnt have to clean anything.

 

thats exactly what i was thinking lol

if it does bother me i'll jus tap the gas or turn the ac on

 

X1,000 Go to the dealer, you spent good money - it is not your problem it is there problem!

Zack

 

yup, agreed... take it back and have them fix it. who idles their motors at 500 rpms anyways? that is nuts... should be 650~700.