Taffy7hfa
Senior Member
- Joined
- May 29, 2016
- Messages
- 1,684
- Reaction score
- 982
- Location
- Oxford
- Your Mercedes
- 2002 ML 270 CDI,2016 Hyundai1.6 CRDI i30,2014 Peugeot 308 HDI. .6 HDI.
The vacuum runs continuously and varies according to engine speed.cleaned all the yuk out of the EGR today, tested it with my vacuum pump and it opens but slowly closes as the vacuum pressure drops,, don't know if its designed to do that or it has a slight leak, if its a leak don't know weather it will affect the operation or is the vacuum supplied continuously to it which may hold it open or is the vacuum switched 'on' to open it then stopped expecting it to stay open until the call to 'off' the pressure and release valve ??
don't know if that made sense?