Hi guys,
I have an issue with tuning WOT with NN
I read a lot of threads in this forum and I'm really thankful for
The people who shared their experience and knowledge but I ran
Into issue that I can't figure it out.
In NN tuning mainly we focus in tuning WOT fueling then taking care of fuel trims finally
Spark.
For WOT tuning we set PE ratio + FA stoich = WOT AFR
If there is EQ Error, we adjusted it with( InjPW vs. Fuel Mass) mutiple by 1.xx richer, 0.xx leaner
(InjPW vs. Fuel Mass) is inverse of the (InjPW vs. Fuel Mass) table
So, my car 3.6 charger with CAI and Gutted Cats I Was targeting WOT for high twelve's AFR
FA Stoich = 0.0688 PE= 0.0100 (the entire table's no blend)
Total FA for WOT = 0.0788 which equal to 12.7 AFR EXT, COT if off
So, the issue I can't figure it out the WOT fueling not constant there is Enrichment
I don't know where is it coming from
here is what going on with me
Scanner results:
-Same tune same file PE=0.100 Theoretically FA=0.0788=12.6AFR
Run (1)
Total FA=0.0848 = 11.8, Wideband = 11.8-12.2 AFR, PE was 0.100 and FA Stoich 0.0688 it
should be 0.0788 why? There is 0.0060 Enrichment!!!
Run (2)
Total FA= 0.0826= 12.1, Wideband = 11.9-12.2 AFR Again,same issue
there is Enrichment!!
-Tune number (2) PE = 0.0095 = 0.0783=12.7 AFR
Run (1)
Total FA = 0.0803 = 12.5, Wideband = 12.3-12.6 AFR again it should be 0.0783?
Run (2,3 and 4 the same results) and its fine
Total Fa = 0.783 = 12.7, Wideband = 12.5-12.8 AFR
That's the issue I ran into it and I can't figure it out
I noticed when positive STFT B1 appears while WOT and mess up FA ratio
Wideband result similer to total FA ratio so i assume there is no EQ error I m right?
-Airflow Max raised
Any suggestions.?
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update
i changed injector pulse width today and it seems make it even worse (got EQ error)
before i have no EQ error at all, commanded total FA in scanner result same as Wideband result
in previous log i noticed 7% STFT in WOT so, i increased WOT Injpw 5% (1.05) and the result
Total FA =12.5 AFR and wideband shows 11.5 AFR.
i think my Issue there is something related to airflow or o2 sensors or i miss something
any clue?