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Thread: S54 problems

  1. #1
    Join Date
    Apr 2014
    Location
    uk
    Posts
    2
    My Cars
    e30

    S54 problems

    Hi I was hoping some of you guys could maybe shed some light on some problems iv been having with my s54 converted e30

    I had the ecu altered to run standalone in any car and then had the car tuned on the dyno, adjusting the existing map not alpha n

    Since mapping I had function control errors on both lambda probes and then the car would be reduced in power, I then found out the post cats and exh temp were still on. Since deleting them I had lambda 2 function only so I replaced both probes for genuine new ones.
    Now I'm getting fuel diagnosis codes for both banks and short term adaption is -0.50 for both probes, lambda 2 came up after I reset the adaptions and then went back to fuel diagnosis and road speed signal

    Now I feel the fuel may be out due to the lambdas failing when it was mapped and it may need looking at again.

    Couple of things that concern me is my idle is at 850-900rpm and I'm not sure if this is normal and I'm getting road speed signal errors, guy who done the ecu says the dyno Rev limit is set to 8k so it will work from that.

    Any ideas or suggestions on how to get this sorted before I go and buy standalone

    Thanks
    Matt

  2. #2
    Join Date
    May 2009
    Location
    Pittsburgh, PA
    Posts
    2,202
    My Cars
    S54/E36,18 Sierra Denali
    Do have the .bin file? I can look at it and compare to some other files I have.

    - - - Updated - - -

    Also make sure you have not swapped bank 1 and 2

  3. #3
    Join Date
    Jun 2005
    Location
    Dirty MFin Jersey
    Posts
    1,306
    My Cars
    M3 Buildup
    Sounds to me like whoever sold you that ecu assumes stand-alone means ews removal only. For s54 to run in non limp mode on another chassis more things need to be done. As is you probably have a 5200 or so rpm limit
    Buy my native installed ISIS ISTA-D/ISTA-P bmw diagnostic laptop. More Info Here!

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