When you say a rough idle, is it a misfire or just a vibration you feel? Often times when this happens, it is the result of a worn motor or transmission mount.
Take a look through this link and let us know if anything helps.
https://www.2carpros.com/articles/vibration-noise
Since you are only feeling it when placed in gear, this could be a possibility.
Let us know.
Joe
SPONSORED LINKS
Was this
helpful?Yes
No
Wednesday, March 25th, 2020 AT 3:44 PM