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      01-27-2013, 10:51 AM   #1
Eric335's Avatar

Drives: 2007 E92 SG 335i 6MT
Join Date: Apr 2011
Location: SW Florida

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2007 BMW 335i  [3.83]
Procede Datalogged: Constant boost off throttle...

Hey everyone,

I have been having pretty bad wastegate rattle at idle/acceleration lately, so i decided to mess around with the WGPositions. What i noticed when i datalogged my car was that i was getting a constant 1.8PSI of boost, even off-throttle/idle. When i played with the throttle a little, the boost built to 1.9 PSI and then fell back to 1.8PSI. When heavily on throttle, the car built boost normally and stopped building boost at 17PSI (the dead-line i set it at).

I recently installed AA DPs. Is it possible that one of the turbos is building boost constantly due to the v-band clamp stopping the actuator? Could this also be the cause of my rough acceleration/idle/wastegate rattle?

BTW- The car didnt throw any codes, and im on 9-10 Aggressive maps

Thanks everyone!

Last edited by Eric335; 01-27-2013 at 11:16 AM.