Okay this problem is really starting to annoy me now as I've spent money on the car with no result!
- Press on throttle = kick in the back
- Foot off the throttle = jerky back and forth
- At low revs the car begins to jerk
- When clutch is in, no symtoms at all. Smooth as silk
At first I assumed this was the load on the engine made worse by a bad engine mount. I replaced this yesterday, but the problem is still there.
A lot of people say it could be the EGR valve, but I doubt that as the EGR valve also causes other symptoms like stalling. My car doesn't ever stall.