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      07-15-2018, 04:32 PM   #4
rkstar9
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Drives: '10 X5 3.5D
Join Date: Sep 2010
Location: Chicago

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Quote:
Originally Posted by MooLard View Post
if I put the gearbox in manual and drive hard at higher revs the boost eventually kicks in above 3k rpm. I guess this indicates that there is not a boost leak otherwise it would not boost at higher rpm.
when my car has a boost leak at the intake it shows no power under 3k rpm then when there is enough airflow it will have power at higher rpms.

so you could still have a boost leak that becomes negligible once you have enough air flow.

one way to test it is to pressurize the boost tract from turbo to intake to make sure there are no leaks.

Quote:
Originally Posted by MooLard View Post
potentially this has ruiined a pressure converter, or electronic valve, or the MAP. Isolating which one is there I am stuck.
to trouble shoot the pressure converters without buying an extra part. swap the front pressure converter to the back and the back one to the front.
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