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Thread: 2009 335i with Cobb tune. Looses power

  1. 01-31-2024, 06:35 AM #1
    BMWjn335i20
    BMWjn335i20 is offline Member
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    2009 BMW 335i

    2009 335i with Cobb tune. Looses power

    Hello
    My bmw convertible runs great!. But looses power when warmed up, l( cold ,fast as hell )no codes. Has stage 1 tune. Any help would be appreciated

    Thanks
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  2. 02-01-2024, 10:21 AM #2
    328 Power 04
    328 Power 04 is offline Is Enabled BMW Tech Expert
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    36 Cylinders
    Does it do the same while stock?
    Any codes while stock?

    Often tunes will have codes disabled from coming up, so it's very hard to get a sense as to what's going on. That or you log a lot of parameters and see what's not doing well: boost actual vs. request, MAF flow, fuel pressures, etc.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S
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