Differences

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--- fueltrimupdatepoints [2008/09/06 05:11]
twdorris
+++ fueltrimupdatepoints [2009/07/13 10:47]
2gDSM
@@ Line 58: / Line 58: @@
   * Baro <= 31.6 inHg
+====== LTFT Select ======
+In the direct access tab, you'll see an item called "LTFTSelect". That table defines which of the 3 long term fuel trim variables (lo, mid, or hi) are selected for use/update at any given time. The selection is done based on MAF sensor frequency (after user compensation is applied).
+You'll notice the stock values on a 2G DSM are:
+Mid on/off: 88/75
+High on/off: 1594/1594
+Meaning the mid will be selected above 88hz and continue to be selected until the MAF sensor frequency drops below 75hz.
+The 1594/1594 values effectively disable the high fuel trim selection on a 2G! If you want to re-enable, try these values instead (taken from an EVO3 ECU, which uses the same MAF sensor as a 2G DSM but has high fuel trims enabled!).
+Mid on/off: 75/62
+High on/off: 156/144
+That will give you three long term fuel trim values, just like the 1G guys.
+Thomas Dorris

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