I don't think there's any hard and fast rule for that. In some cases, more duty cycle opens a valve further, and in others, it closes it further.
Be good to know, which is fact as the whole idea of seeing what the valve is doing,, duty cycle especially for boost control, ie if bleeding off more air= more boost,
or Egr to see if more air is being cycled into the inlet manifold,, which at the wrong time can cause running problems.
Do some groundwork yourself & work it out it's not rocket science, it's been said time & again on here that VCDS reports what the ECU allows you to see, it's your job from then on to use technical info & system knowledge to evaluate what's going on !
Because it's like asking, "Is an oil pressure switch normally open or normally closed?" There is no correct answer. It depends on which switch and what engine.This is a forum! to help each other,, do you know the questions above, it must of been asked many times before, seems no knows for sure on this forum,,
Because it's like asking, "Is an oil pressure switch normally open or normally closed?" There is no correct answer. It depends on which switch and what engine.
Well I have seen guys invert the duty cycle and create a reverse opening noid to allow or not allow vacuum or boost to control a VNT or traditional WG ........with stock stuff, and no DTC's because it controlled the range.
If looking at boost request verse actual a lot can be determined.........same goes for the EGR by disabling and watching the offset achieved in actual boost if looking for a parasite.
Guys saw net gains with older type turbo from AHU installed on ALH with get this ? Lower NOX levels.
Well the 1Z AHU ALH etc > on all use a MAP sensor whether internal or external, and if you don't make or exceed the specified boost request.......... there is a safety in EDC15 to shut down fuel and LIMP.