Quote:
Originally Posted by Coupes33
I currently have the same problem with my 335i. What was the cause of the throttle closures and how was it rectified? I have carried out data logging with the Cobb and found that when the Boost Means Abs value exceeds the Req Boost value the throttle begins to close and the car begins surging. It happened out of the blue. My tuner has had the car on the dyno for a couple of hours and cannot find anything. All readings are normal apart from the above readings and no fault codes are coming up. What has all of a sudden caused the over boosting is the issue. He believes it will be something stupid. It will send me nutty trying to find the cause.
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Throttle closure happens either when overboosting or i you have traction control activated ( you need to press the DSC button for 10 seconds until you get the yellow triangle to fully deactivate traction control).
Post a long and i will take a look at it and try to help out