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e60 535d 272hp big pressure loss on turbo transition
hello everyone
my name is Michael and i`am Mechanical Engineer
3 months ago i buy a 535d 272hp (non facelift) and i have the following problem
i do a log with 4th gear from 1600rpm to max rpm I discovered that between 3200 to 3600 i have 200 milibar loss of boost
by now i changed:
-all vaccum hoses
-tested vaccum leak
-both pressure converters and electrovalve 11747796634 11657793032 11747810831
-tested for vaccum leak all 3 actuators
I lost all the ideas and car still have this pressure loos and from my point of view is from transition between small and big turbo