Hello
I have browsed through the various topics on this and have been unable to find a conclusive solution to the problem.
We have a 2012 Terrain 2.4l AWD with approx 140,000km on it.
A few months ago the vehicle began to idle rough when stopped, it has progressively been getting worse.
It began only in eco mode when stopped, and only from time to time. It has now come to a point where it happens frequently. Trends we have noticed are that it does not happen when the motor is cold and only after it has warmed up, it only begins approx 7 seconds after coming to an entire stop. Switching out of eco mode will reduce it and shifting to neutral will make the issue go away.
This is a rough idle to the point where voltage will fluctuate (lights dim), the car will also rock back and forth. On rare occasion the rough idle is so severe that it causes the engine to stall.
We have ran injector cleaner through, replaced both VVT Solenoids and cleaned the MAF sensor.
I am now at a loss for what some of the possible issues may be, thoughts would be a faulty MAF sensor, possibly O2 sensors. However the car runs perfectly fine under any other conditions which leads me to not suspect the MAF sensor.
I have looked at the readings on a few sensors, the part of the graph circled is during rough idle.
Any insight into this would be appreciated, shops we have had it in to so far have been unable to diagnose the issue . No codes are being thrown.
Thanks
I have browsed through the various topics on this and have been unable to find a conclusive solution to the problem.
We have a 2012 Terrain 2.4l AWD with approx 140,000km on it.
A few months ago the vehicle began to idle rough when stopped, it has progressively been getting worse.
It began only in eco mode when stopped, and only from time to time. It has now come to a point where it happens frequently. Trends we have noticed are that it does not happen when the motor is cold and only after it has warmed up, it only begins approx 7 seconds after coming to an entire stop. Switching out of eco mode will reduce it and shifting to neutral will make the issue go away.
This is a rough idle to the point where voltage will fluctuate (lights dim), the car will also rock back and forth. On rare occasion the rough idle is so severe that it causes the engine to stall.
We have ran injector cleaner through, replaced both VVT Solenoids and cleaned the MAF sensor.
I am now at a loss for what some of the possible issues may be, thoughts would be a faulty MAF sensor, possibly O2 sensors. However the car runs perfectly fine under any other conditions which leads me to not suspect the MAF sensor.
I have looked at the readings on a few sensors, the part of the graph circled is during rough idle.
Any insight into this would be appreciated, shops we have had it in to so far have been unable to diagnose the issue . No codes are being thrown.
Thanks