Engine shaking

[brian1.9diesel]

What would cause an engine to shake?
It’s a 1998 diesel hatch, 73K, face lift model.
I have checked the obvious things like all the engine mounts, nipped up the injector pipes, nipped up the bleed valve etc on the pump. But it still shakes!
When the engine is revved slightly the shaking disappears. When I changed the glow plugs before on the car I had to replace one of the injector pipes, so I used one from a Polo diesel. Would this have an effect? Could it be a different diameter pipe? I know that the engine was not shaking before, so there is something . wrong?!

Thanks Brian

[KenONeill]

The injector pipe is a red herring if the engine's idling and you've not changed the injector it's feeding.

[brian1.9diesel]

So at the miles you reckon that the injectors should be changed?

[KenONeill]

I didn't say that. In fact I've no idea what the problem is as such, but as long as the replacement pipe was clean inside it will flow enough fuel for idling even if it's under bore for full throttle running. The fuel flow is basically controlled by the pump and injectors, not the pipes that connect them.