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AFR adjustments

Hi, I have a MY2009 with UpREV Tuner. The ECU is a 1EL5B. My mods are: GEN3, BerkHFC, Nismo CatBack. My question is: Why twice a year I must readjust

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Old 08-20-2015, 02:40 AM   #1 (permalink)
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Default AFR adjustments

Hi,

I have a MY2009 with UpREV Tuner. The ECU is a 1EL5B.

My mods are: GEN3, BerkHFC, Nismo CatBack.

My question is:

Why twice a year I must readjust AFR Compensation?
(i.e. if target is 12.6 I read 13.2 or in the other season 11.5 )
- It's a problem of UpREV that does not compensate changes in environment? (i.e. hot season or atmospheric pressure)
- It's a problem of my setup (GEN3)?

Note that The MAF works correctly, in my logs I see always the full excursion range in Volts.

What do you think?
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