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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > N55 Boostleak/Underboost
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      11-22-2024, 04:21 PM   #1
6spdf30
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N55 Boostleak/Underboost

I believe I have a boost leak or underboost not sure. Just replaced the blow off value and the problem is still persistent. Does anyone have any idea what it could be. Mid acceleration blow off value lets boost out and rpms jump. There is no current codes that the car has thrown.

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      12-14-2024, 04:16 PM   #2
PLEB
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Hey man, do you have any logs?
Is this a Manual, maybe its slipping?
On the other hand, I don't think a slipping clutch would make the DV actuate to let air out.

That DV sounds amazing though xD

(I'm not experienced, just my thoughts..)
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      12-16-2024, 12:04 PM   #3
AmuroRay
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Quote:
Originally Posted by 6spdf30 View Post
I believe I have a boost leak or underboost not sure. Just replaced the blow off value and the problem is still persistent. Does anyone have any idea what it could be. Mid acceleration blow off value lets boost out and rpms jump. There is no current codes that the car has thrown.

View post on imgur.com
Careful driving in those conditions!
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As long 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
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