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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Buckin Bronco!



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      06-15-2010, 08:34 PM   #1
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Buckin Bronco!

Seems like there are a few others suffering from the bucking sensations under light throttle. Will switching to older maps fix the problem temporarily until shiv comes out with the fix? Or maybe the problem can be solved by simply switching to valet mode? what do yall think?
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      06-15-2010, 08:47 PM   #2
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yep you can switch to an older map before the updated one comes out. also, Shiv found the bug and I can attest to the fact that the updated map does intact fix the issue.

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Yep, looks like I found the cause. It was caused by a bug when transitioning from leanrun cruise to normal operation. It caused short term fuel trims to build-up and the car to rich for an instance (0.2 sec) and caused a hiccup. Currently running new maps (with additional autotuning functionality) on a few customer cars. All have reported that the hiccup is gone which bodes well for the next release.

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      06-15-2010, 08:52 PM   #3
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Shiv stated that he found the bug for the bucking bronco syndrome and it will be fixed on the next update thats coming next week....Hold on to the saddle a little tighter for now! lol
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      06-16-2010, 12:02 AM   #4
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what map do u think we should switch to? the pnly ones i saw on shivs forum were the autotuning maps or v3 ones. also do we need to change to older firmware too?
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      06-16-2010, 06:39 AM   #5
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yes need to match firmware, someone recently asked about older maps and someone came forward saying they have a ton of them saved. check the autotune thread (one of the pages near the end), I think that guy posted in there about it. if not do a search, or just wait a few days for the update

Last edited by jpsimon; 06-16-2010 at 07:04 AM..
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