This will be difficult to explain but here goes.
The zed is running well, it idles fine, is smooth and pulls well on acceleration, but I have this small issue when driving at a constant speed.
You feel the car ever so slightly bouncing in the revs, which manifests itself as a small rhythmic vibration in the cab (Steady!).
Its most noticeable when you are in a higher gear and often when cruising up an incline.
It only happens when the car is in gear, and stops instantly if you take it out of gear and coast, so I know its engine related rather than the drive train or wheels. Its like something isn’t controlling the revs properly and is bouncing on and off, and like I say this is when you are trying to maintain a steady speed.
Any thoughts?
Thanks