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Catless Downpipe CEL

Discussion in 'DME / ECU Software Tuning' started by twarner776, Oct 6, 2019.

  1. BigTeamBattles

    BigTeamBattles Well-Known Member

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    which spacers are you using?
     
  2. RRKnight

    RRKnight Well-Known Member

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  3. OP
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    twarner776

    twarner776 Well-Known Member

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    Based on other threads, the cars are just much more sensitive to changes than in the past. To that part, i have decided to give up on trying different spacers etc, and just move to a tune that can suppress those. While its early, so far im pretty happy with that decision. Hopefully, the issues are behind me.
     
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  4. Toyotawild

    Toyotawild Well-Known Member

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    Did you just put the o2 sensor back into stock location without any o2 extension or defouler then?
     
  5. OP
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    twarner776

    twarner776 Well-Known Member

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    Currently I still have the fabspeed spacer in place but at this point I should be able to take it out which I plan to do this week.
     
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  6. Toyotawild

    Toyotawild Well-Known Member

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    Sweet keep me posted. What tune are you using?
     
  7. OP
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    twarner776

    twarner776 Well-Known Member

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    MHD
     
  8. Toyotawild

    Toyotawild Well-Known Member

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    Stage 2 ots?
     
  9. OP
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    twarner776

    twarner776 Well-Known Member

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    Stage 2, but its a custom map for the beta (which very well may be the same as OTS). I just flashed it today so not a ton of miles on it yet.
     
  10. Toyotawild

    Toyotawild Well-Known Member

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    Sweet. How's the power?
     
  11. BigTeamBattles

    BigTeamBattles Well-Known Member

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    I was thinking about titan catless downpipe with fabspeed o2 spacer, but even with fabspeed it's throwing cels?
     
  12. OP
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    twarner776

    twarner776 Well-Known Member

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    Mine was yes, but those issues could have been from a number a things. I took out my fabspeed spacer yesterday and reconnected the 02 sensors back into the DP directly, if your interested in it just PM me.
     
  13. Haros

    Haros Well-Known Member

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    Currently all the mini cats throw codes. It’s too sensitive and there is no option besides a direct tune to stop the code, thus voiding warranty.

    I’ve messaged a few users and any previous “no cel” are now getting cels.

    so the option is to either keep clearing it with a piggyback, flash the car directly or forgo the downpipe all together if the light bothers you.

    That being said, some people in my neck of the woods are 100% confident when the BMW phones home it still reports a piggyback to the manufacturer for logging. So maybe just go “all out” and drop by your turner and get a direct tune.
     
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  14. BigTeamBattles

    BigTeamBattles Well-Known Member

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    so......are you telling me that BMW can still trace piggybacks?! :eek:
     
  15. OP
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    twarner776

    twarner776 Well-Known Member

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    I'm on MHD and still getting CEL.....it's not just the piggyback.
     

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