Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

closed loop tuning question

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Old 10-31-2009, 04:26 PM
  #1  
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closed loop tuning question

I am trying a closed loop tune, I like it so far, good idle, good cruise and good WOT AFR's, the question I have and have not been able to figure out is, during mild acceleration at low RPMs right before it goes into PE (where it goes to 13.3), it goes lean, how do I rich en it up under mild acceleration, it goes up 16.7 or so, then returns back to about 14.6-15.3 which is good.
Or better yet will this hurt anything as long as it does not stay there.
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Old 11-09-2009, 10:06 AM
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I run a 97ss 383 D1 w/ MM6 3.73:1 Moser. I did my own flash program on OBD2 PCM. I have zeroed the PE vs. Temp cal, and, only use PE vs. rpm. Approximatly 10 units is equal to 1 point in afr. The WOT cal is split between 60 to 40% enable PE mode. I have had trouble with PE vs. Temp power enrichment cal. I currently run 34* timing adv @ 100 kpa or 14psi. I idle around 60Kpa.

I also have recalibrated my MAF sensor 3 to 5% lower and rased the BLM matrix @ higher MAP and RPM boundries. This helped me achieve stoic @ cruz low speed ride for better fuel mpg.

I'm using lt1_edit version 2.2.

I hope this helps you with some ideas. B.
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