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Need help with High AFRs

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Old Mar 4, 2010 | 12:50 PM
  #76  
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well he can adjust it smaller but it seems there is a background map that caps the minimum value if I understand it correctly.
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Old Mar 4, 2010 | 11:56 PM
  #77  
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Originally Posted by JohnBradley
well he can adjust it smaller but it seems there is a background map that caps the minimum value if I understand it correctly.
Correct, when logging afrmap it seems the lowest value the ecu sees is 10.01. I did some logging today and confirmed for sure that the fuel map follows some higher load. Anything that registers 100+ load in evoscan will refrence my highest load column (150) in the fuel table. Now I dont quite know how this all works yet but at one point I seen 4500 rpms and a 45 load value, the ecu clearly refrenced the 80 load column in the fuel table. Another one had 4750rpms 50% load and it was clearly referencing around 100 load column. Now I assume this will not be a linear thing (ie evoscan says 70 load so my fuel table references around 110 120 load column) Or would it be? At this point I really think my best option is to lower the maf size to drop my load values down. Its hard enough to try and tune for 150 load with my ecu maps but looks like left as is I would have to scale my fuel map to around 200-210 load to tune it which means I would be jumping 20-30 load per column. I logged loadcalc along with ecuload today and found they were always within 10% load of eachother so no help there. I still dont know why it is referencing this other load value, but for all I know this is normal for the lancer ecu as there isnt a lot of support for this ecu for obvious reasons.

If I havent said it yet I greatly appreciate you guys taking the time to help me figure this all out.
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Old Mar 5, 2010 | 10:57 AM
  #78  
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The fuel map uses boost comp so if the AFR is set at 100 load its the same to whatever the last load number you use is. Give me a bit and I will post a screenshot of what I am talking about.

Aaron
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Old Mar 5, 2010 | 11:07 AM
  #79  
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Very loose example of what I mean.

Last edited by JohnBradley; Mar 5, 2010 at 11:19 AM.
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Old Mar 5, 2010 | 11:38 AM
  #80  
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I think I understand, so what your saying is pretty much at 2500rpms whether the load is 100 or 190 the afr will be the same because of how a turbo spools up? This makes sense. I did something similiar to the map you posted, I changed every value I had below 10.1 and raised it to 10.1 with absolutely no change to my actual afrs. This is the response I expected from the ecu confiming the 10.01 bottom afr value it reads. Is there any other way to add fuel other than lowering fuel map and raising maf scaling values?
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