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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 > Having problm with my jb4 on 3er gear

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      07-21-2013, 06:44 PM   #1
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Drives: bmw 335is
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Having problm with my jb4 on 3er gear

I have a automatic 335 e90 2008 and I bought from my friend 1 year ago his jb4 and everything was working perfect,I always drive on map 5 because I have intercooler ,full exhaust,intake,down pipes and blow off Valve .Yesterday I was runing in the car and when I press the 3 gear it lost power ,,and now everytime I run all the gears are perfect but when I put the 3 it lose power I can feel.I call a friend that he works on active autowerke and he told me to put the jb4 on map 0 to desactive it and then I race the car and in 3 gear I did not feel any problem ,so he told me that the problem was coming from the jb4.Please I need your help .
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      07-21-2013, 06:46 PM   #2
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Drives: black 335i E90
Join Date: Sep 2012
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PUt it on map 5 floor it and when it looses power, see what the code says. Probably something simple

Can you take a log?
- Proven Power Tampa Built 6466 ST N54 6AT WR 711whp 637wtq -
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