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Thread: E38 ecm with out upgradeable OS and BC

  1. #1
    Tuner
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    E38 ecm with out upgradeable OS and BC

    Hello I am learning here and have a question about the use of Bluecat. I have a E38 ecm that is not eligible for the OS upgrade. The question is if I run Bluecat do I need to use the standard format be it LS1,2,3 and not the formats with the higher map readings. The truck is turbocharged but when I use the formats with the higher Map readings I get weird VE tables(graphs) as shown in the attachments. If I use say the LS1 the graph looks normal. I do have the 3 bar map used in the ZR1 if that makes any difference. Thank you for any and all responces.


    2.5bar ve.PNGls1ve.PNG

  2. #2
    Advanced Tuner
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    If you are starting with a N/A engine, import those coeffs/parameters into EQ<>VE, and select larger than a 1Bar (i.e. 2-2.5Bar) table, then you will see this occur. You need to hand smooth the values to give "sane" ones then start tuning it. Just because you're not using them in the 1Bar tables doesnt mean GM didnt include them in the calibration, GM just didnt bother tuning or using the MAP values over 1Bar for N/A engines. The values exist in EVERY Gen IV+ (except E40) ECM from 0kPa to 255kPa regardless of induction type.
    ~Erik~
    2013 Sonic RS - manual, CGM, 6M, sunroof, mods in process
    2008 TrailBlazer 3SS AWD LS2, loaded, dropped, modded, SE22 Performance tuned. And then some...
    2002 TrailBlazer LT 4WD 4.2L I6, lifted, tires, exhaust, SE22 Performance tuned

  3. #3
    Senior Tuner mowton's Avatar
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    e-mail sent, correct Zone Map Boundaries and problem goes away.

    Ed M
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  4. #4
    Tuner
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    Thank you Mowton and Scarabepic for the info. Thanks for everything Mowton.