My name is Daniel and I am Portuguese. Sorry I do not know write in French but I talk with a moderator.

I have a engine OM616.934 and I don't know "Corps Papillon" works.
When I accelerate Open two Valve/Covers (I do not know the correct name) But when decelerate only one close the other Do not close. I think something missing.
Merci.
PS: that is the corps http://www.ptp-images.com/affiche-direc ... 36e76.html