[Nick44]

Hi all, a lot of us know of the potential issues arising with these.

No boost under 2500 rpm.

Looked through the threads and replaced various sensors, boost converters, pipes and even the vacuum pump itself. This car has had swirl flaps removed.

I did take it to a specialist in Wigan but they didn’t look at that problem.

Code active is 4530.

Does anyone know any good garages who are proficient in testing the vacuum system and repair? I’m open to any and all ideas including redoing the vacuum lines

Nick

[rasa bmw]

yes,,but where are you from,,try jason at bwchiptune middlesex

[Nick44]

Around the Wigan area. At this point im willing to try anywhere providing the person has good experience in testing these systems as it will be a cost for me to get the car anywhere regardless of the distance (currently sorn)

[E60525d]

How do you know the vacuum system is at fault? Have you scanned using ISTA?

[Nick44]

https://www.e90post.com/forums/showthread.php?t=1066141

A bit of info on the code.

I suppose what I’m looking for is someone who has dealt with this issue when it hasn’t been as simple as changing a boost converter