I have a 2012 I4 Terrain with right at 2k miles on it. A few weeks ago I noticed that the idle felt a little rough sitting at stop lights after the engine was warm. Not horrible, just bounced between about 450 and 650 rpm. I have driven it in ECO mode probably 85% - 90% since I picked it up in October.
I took it to the dealer to make sure everything was okay and their computer showed nothing was wrong. Target RPM & actual RPM matched, etc. I didn't notice that the tech turned off ECO mode when we took it for a spin to see if we could duplicate the issue (we could not).
They told me to call if it did it again and they would take another look.
On the drive home it was indeed fine. About half-way home I noticed ECO mode was off; I flipped it back on. The slightly rough idle returned!
If I'm sitting in ECO mode, the idle bounced between 450 and 650 rpm. If I turn ECO mode off the idle jumps to maybe 850-900 rpm and is very smooth.
Just curious, is this normal behavior as the engine tries to eck out as much efficiency as possible or should I head back to the dealer for this?
I took it to the dealer to make sure everything was okay and their computer showed nothing was wrong. Target RPM & actual RPM matched, etc. I didn't notice that the tech turned off ECO mode when we took it for a spin to see if we could duplicate the issue (we could not).
They told me to call if it did it again and they would take another look.
On the drive home it was indeed fine. About half-way home I noticed ECO mode was off; I flipped it back on. The slightly rough idle returned!
If I'm sitting in ECO mode, the idle bounced between 450 and 650 rpm. If I turn ECO mode off the idle jumps to maybe 850-900 rpm and is very smooth.
Just curious, is this normal behavior as the engine tries to eck out as much efficiency as possible or should I head back to the dealer for this?