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  1. #1
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    Question Does the BMS DPFIX have a by-pass mode?

    @ Terry@BMS and the rest of you who have the BMS DPFIX, I have a few questions:

    I've recently passed my emissions test in IL (with flying colors Click here to enlarge ) and now that Cobb includes suppression for the cat inefficiency codes, I am wondering if I can disable the BMS DPFix until I need it again. I'd like to keep it in the ECU box, but dial in a setting that will essentially by-pass the signals.

    Is this possible, or do I have to remove it completely?

    My main reasoning for doing this is that I've read a few posts on the other forum stating that the fuel efficiency suffers a bit and that the AFRs might be affected if you have COBB and you leave the BMS DPFIX.

    Comments, suggestions and feedback are welcome.

    Thanks
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  2. #2
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    Click here to enlarge Originally Posted by vasillalov Click here to enlarge
    @ Terry@BMS and the rest of you who have the BMS DPFIX, I have a few questions:

    I've recently passed my emissions test in IL (with flying colors Click here to enlarge ) and now that Cobb includes suppression for the cat inefficiency codes, I am wondering if I can disable the BMS DPFix until I need it again. I'd like to keep it in the ECU box, but dial in a setting that will essentially by-pass the signals.

    Is this possible, or do I have to remove it completely?

    My main reasoning for doing this is that I've read a few posts on the other forum stating that the fuel efficiency suffers a bit and that the AFRs might be affected if you have COBB and you leave the BMS DPFIX.

    Comments, suggestions and feedback are welcome.

    Thanks
    I tried turning the DP fix dial all the way to the left to make it as weak as possible but it still $#@!s with lambda readings on one bank.

    I don't think there's a way to Make it passthru unfortunately.

  3. #3
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    ^^

    Thanks! I'll take mine off this weekend and see how things go. I used to get easy 32 mpg on the highway, now I'm lucky if I get 28-29. I don't travel much generally but why waste fuel when you don't have to.
    From all the things I've lost,
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  4. #4
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    wow! I've never gotten more than 24 MPG on the highway. WTF LOL
    2011 335is DCT, collecting parts....


  5. #5
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    Click here to enlarge Originally Posted by bigdnno98 Click here to enlarge
    wow! I've never gotten more than 24 MPG on the highway. WTF LOL
    Yeah, something is not right or you are not driving smoothly. Best I've done was 33.7mpg in Nebraska (flat smooth roads with no hills or traffic). That was when my DME was still stock but the car was fully catless. I normally don't drive more than 7K miles per year, so fuel efficiency is least of my worries...
    From all the things I've lost,
    I miss my mind the most!
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  6. #6
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    Weird on pump gas sustained highway I see 29-30 mpg. On E85 that all goes out the window lol.

  7. #7
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    When did this change happen? I got protuned back in july when the new 4.0 oscillation fix was first released....my car seems fine with the DP fix. I get like 26mpg avg, 30 mph hwy.
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  8. #8
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    MPG depends on seasonal blends of gas as well, as well as all the other stuff, tire pressure, airfilter ect

  9. #9
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    i do like 280 miles on E50 lol
    07 335i AT - MOTIV 750 - MHD BMS E85 - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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