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Dakota Performance
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fastpastor
Dodge Dakota
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9/19/2005
14:02:41

Subject: incorrect fuel/air
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one quick question: does anyone know why my stock cpu would mess up my air fuel ratio by adding performance parts? I went to the dyno the other day and i lost 4hp and 14 lb of torque from my last dyno run. the difference, this time i had gibson headers and a pulley in addition to a CAI and MBRP catback.
Does anyone know if there is a way to adjust my air fuel ratio? the dyno people told me i was running a full point to rich. thanks

04 4.7L Dakota QC Gibson unequal length headers, MBRP CATback, March pulley, CAI



daddio
Dodge Dakota
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9/19/2005
14:07:28

RE: incorrect fuel/air
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check your O2 or map sensor.



?
Dodge Dakota
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9/19/2005
15:40:54

RE: incorrect fuel/air
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How long have you had the Gibson's on ?
Can take a week of running around for the
computer to be able to " correct " for them..



FLDak
Dodge Dakota
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9/20/2005
11:22:45

RE: incorrect fuel/air
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fastpastor;
Check out these sites and products:

http://www.splitsec.com/
Look at the ARC1 Air/Fuel Ratio Calibrator
or
http://www.krcperformance.com/newcontent/pcm.html
scroll down to the bottom of the page and look at the ROE Racing VEC1. Thats what I have.

I think they both do the same thing though. Your dyno guy is right, Dodge engines start out lean on the a/f curve and then they get fat at WOT. With the ROE controller I was able to dial it back during the WOT so it would not be so fat at the bottom of the a/f curve.
Hope this helps you,
Later...



fastpastor
Dodge Dakota
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9/21/2005
09:21:37

RE: incorrect fuel/air
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hey thanks everyone.
In answer to ? question, i have had the headers on for over 6 months and i allowed the computer to reset.
I will let you all know what happens



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