Rusty911
A2OC Donor
If you install the Pro Boost map there is no need to replace the actuator, in fact as it is not used I think it can be removed, but no point making needless work.
What Steve said in his reply to you about the flaps is correct. If your flaps are in the rest position then there is no need to do any manifold work and the Pro boost map will work as intended. The awkward question is did the actuator break because the flaps seized in an intermediate or closed position. If the Pro Boost map is implemented in such a scenario then the air intake profile will be wrong for the new map and how this will effect performance I think is unkown at this early stage of map release. {Hi Steve (@A2Steve), sorry for butting in and have no wish to discourage take up of the new map, but this would be a good question for Arian at Pro Boost.} It seems to me the sensible course of action is to try and establish the current position of the flaps. This should be possible with VCDS - have at look at my post over in the P1031 thread, but it this does assume the flap potentiometer is working correctly. The other course of action is to strip down inspect and clean to de-seize but with labour costs, before the new map.
Andy
It's a good point.
Surely someone with a known working flap system could just measure / photograph / reference the normal rest position at the actuator (which I think is easy to see / access)? If the arm isn't flapping about and is attached at both ends then there must be a way of quickly establishing flap position. This could become part of the Pro-Boost installation guide perhaps.
Using VCDS as a reference assumes three things: 1) the user has access to VCDs, 2) the potentiometer is working and 3) nothing's broken. The above quick ref wouldn't need any system and doesn't rely on the potentiometer. You can manually check the arm isn't flapping around, but I would concede you'd be making an assumption that the cross-shaft and flaps are O.K., but you could argue that with the VCDS method as well.
No doubt I'll be fiddling with at least one FSi at some point this weekend: will have a look and try get to get some pics.