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  1. Replies
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    Unfortunately not. As already said I tested to...

    Unfortunately not. As already said I tested to adjust min final spark base ([ECM] 12701). It showed -10 for the rpm vs. cyl air in question before the change. Actual idle spark was -7. A change of...
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    765

    E38 idle spark limit?!

    Hi all,

    sorry, I have a weird question. Im tuning for German emissions insanity and therefore I need horrible idle spark advance values in order to get the converters heated after cold start. I...
  3. E38 stuck in idle fuel trim cell after cold start

    Hi all,

    Im struggeling with the ECUs behavior after cold start. I retarded catalyst heating spark to get quicker catalyst light off. Under idle and also under idle with "simulated" driving by...
  4. Toyota 86 111332111333

    Toyota 86
    111332111333
  5. Think I found a route to deal with that. Did two...

    Think I found a route to deal with that. Did two things:

    -catalyst heating spark table: retard increased only for rpms arround target idle (to avoid that heating retard is already effecting the...
  6. 4 Gas tester and I already have additional post...

    4 Gas tester and I already have additional post O2 converters... :)
  7. Hmm, OL EQ ratio could be indeed a possibilitys....

    Hmm, OL EQ ratio could be indeed a possibilitys. Since CL anyway starts after a few seconds this could limit the effect to exactly the area I want.

    I already achieved the Limits for NOx after the...
  8. Ive done a LSswap to a 2012 model year car in...

    Ive done a LSswap to a 2012 model year car in Europe what means I have to fullfill Euro5 emmission homologation to get aproval for road use. This means not a simple emmission test as done every two...
  9. I can confirm. APP correlation is extremely...

    I can confirm. APP correlation is extremely sensitive. Unplugging and reconecting any connector between APP sensor and ECU, even moving arround the harness a little, can be enough to cure a slightly...
  10. E38 catalyst heating spark vs. startup fuel gain

    Hi all,

    Im dealing with the catalyst heating spark table. I need to retard timing after cold start aggressively to get my converters heated for cold start emmissions test. I already achieved some...
  11. Replies
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    Im also dealing with this issue and I need DFCO...

    Im also dealing with this issue and I need DFCO kicking in imediately to pass a emissions test.

    LS3 stock besides shortys and CAI (also stock converters)

    The DFCO entry spark blend time just...
  12. Replies
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    4,371

    I unfortunately dont have this PID logged on the...

    I unfortunately dont have this PID logged on the files I see this happen, but based on both MAF and VE airmass readings vs rpm, the cyl airmass should be well below the set boundrys. (based on a...
  13. Thread: STFT Issues

    by TRStech
    Replies
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    4,164

    Could it be possible, that the "test" some users...

    Could it be possible, that the "test" some users are decribing here is the catalyst learn function which is part of the GM driving cycle learn procedure? Im refering to the emission DTC?s which have...
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    Im not sure if I can agree with this assumption....

    Im not sure if I can agree with this assumption. Im also dealing with thtis value currently, since Im seeing strange beahavior under decel. Im running the engine in a lighter car with and with a...
  15. Want to let you know what I found out concerning...

    Want to let you know what I found out concerning this specific issue: It was the base airflow beeing high.

    I corrected the MAF airflow for idle conditions pretty much to optimum and it turned out...
  16. LS3/E38 emissions tuning / idle transistions

    Hi all,

    I found another culprit during my measurements. Ive got issues with a rich condition, as it seems during rpm falls down to idle from a higher rpm or directly after. It seems that CL is...
  17. Replies
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    Reviving this once more: Im looking into this...

    Reviving this once more: Im looking into this under the aspect of emission reduction, trying to understand if this funsction could have any impact.

    Im in the situation that my MT swap car (LS3...
  18. First of all, thanks for sharing this knowledge!...

    First of all, thanks for sharing this knowledge! This is way beyond my current skills, but I will take this as a starting point to dive into that.

    Concerning the Offset, true, I had this thoughts...
  19. Not in the historic logs, but I will in the...

    Not in the historic logs, but I will in the future... :)

    I also zeroed out the Offset vs. Inj. tip temp in the tune.
  20. Thanks, this could explane everything from the...

    Thanks, this could explane everything from the second I did the first flash today. But Im still confused between the first two logs I mentioned (actualy #2 and 4 of today). The flash wasnt changed....
  21. I meanwhile have some issues with geting my idle...

    I meanwhile have some issues with geting my idle LTFTs/Airflow spot on. I have the phenomenon, that I start with tune A, seeing LTFT 0. Stop engine, save log, start engine -> LTFT +7. Shut off...
  22. I have to do actual measurements. I just can see...

    I have to do actual measurements. I just can see that it starts with a 40ms prime shot as good as with 100ms when cold. What this means for the total emmissions was not measured yet.

    Sure, I will...
  23. I watched this value over the last tune steps. It...

    I watched this value over the last tune steps. It seems that it needs at least one cold start after writing a new tune before it starts reporting any values again. It seems that the start value is...
  24. Maybe a completely stupid question, but since I...

    Maybe a completely stupid question, but since I started playing arround with open loop values and tables, my ambient air temp sensor is reading static 0C. Any idea about that? (No, I dont see any...
  25. Thanks @hjturbo! Yes, the MAF and VVE needs realy...

    Thanks @hjturbo! Yes, the MAF and VVE needs realy a lot of care. The negative numbers are in the low rpm+low load area.

    Im working with an MPVI2 for loging and tuning, waiting for a AEM X inline...
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