Vito engine judder

[Jeaumoer]

Bought a 200k km Vito last week and having a weird issue

Petrol/manual 638 (113) M111? Vito van, rough idle and no power/judder after coasting down long hills in neutral. Can only be cleared by switching off and restarting.

Coasting with the ignition switched off now and no problem on restart but I'd like to keep the motor running. Otherwise motor idles/pulls well and doesn't overheat, is light on fuel etc.
Any ideas/suggestions? Thanks

 

[carat 3.6]

Why are you coasting down hills?

 

[Jeaumoer]

Saves gas, cools things down - why?

 

[Jeaumoer]

Thanks for all the responses and helpful info

Problem was traced to a leaky breather pipe.

Still looking for a proper workshop manual for the 638 petrol series.

Anybody know how to reset the ABS light on these? Reconnected the battery and voila - new surprise!

 

[Vitobrabus]

Tried driving it. I think abs light stays on until you have drive a few meters and all sensors report wheel speed ok.